Multi-probe Cluster Cosmology Analyses with Photometric Surveys

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (126 download)

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Book Synopsis Multi-probe Cluster Cosmology Analyses with Photometric Surveys by : Chun-Hao To

Download or read book Multi-probe Cluster Cosmology Analyses with Photometric Surveys written by Chun-Hao To and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The universe we live in is expanding faster and faster. This phenomenon called cosmic acceleration is one of the most puzzling cosmological discoveries in the past 25 years: even the least exotic explanation requires a new pervasive energy component in our universe (called dark energy). Despite the mysterious nature of dark energy, a model ($\Lambda$CDM) based on Einstein's general relativity, a cosmological constant (a specific form of dark energy), and slowly moving dark matter, seems to be able to describe a variety of observations from the high- to low-redshift universe. To understand the nature of dark energy and to test the $\Lambda$CDM paradigm, ambitious cosmological surveys, such as the Dark Energy Survey (DES), the Dark Energy Spectroscopic Instrument (DESI), the Rubin Observatory's Legacy Survey of Space and Time (LSST), and the Roman Space Telescope, aim to precisely and robustly measure cosmic structure and its evolution via various cosmological probes, such as weak gravitational lensing, galaxy clustering, and other techniques. Combining multiple cosmological probes (known as multi-probe analyses) provides precise and robust cosmological constraints. Galaxy clustering, weak gravitational lensing, and abundances of galaxy clusters each are sensitive to different aspects of cosmic structure formation and are affected by different astrophysical and observational uncertainties. Thus, their combination is expected to be more precise and robust than any of the probe alone. Among these probes, the abundances and spatial distribution of galaxy clusters, which are associated with the highest peaks in the matter density field, provide powerful probes of cosmic structure and its evolution. This thesis presents original research that improves our understandings of the universe by observations of galaxy clusters. In the three self-contained projects, I (1) develop and validate methods for combining cluster abundances and two-point correlation functions, (2) perform the first blind cosmology analysis on combining cluster abundances, weak gravitational lensing, and galaxy clustering using data taken in the first season (DES-Y1) of the Dark Energy Survey, and (3) quantify the connections between red galaxies and their host dark matter halos by modeling luminosity functions of galaxies in galaxy clusters. While these three projects have already advanced our understandings of the cosmos, they also serve as an example of how one can use millions of clusters expected to be detected with the upcoming surveys in 2020s to improve our knowledge of the universe. These opportunities are also discussed in this thesis.

Strong Gravitational Lensing as a Probe of Galaxy Evolution and Cosmology

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ISBN 13 :
Total Pages : 297 pages
Book Rating : 4.:/5 (867 download)

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Book Synopsis Strong Gravitational Lensing as a Probe of Galaxy Evolution and Cosmology by : Kenneth Christopher Wong

Download or read book Strong Gravitational Lensing as a Probe of Galaxy Evolution and Cosmology written by Kenneth Christopher Wong and published by . This book was released on 2013 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, I explore how the environments of both galaxy and cluster-scale strong gravitational lenses affect studies of cosmology and the properties of the earliest galaxies. Galaxy-scale lenses with measured time delays can be used to determine the Hubble constant, given an accurate lens model. However, perturbations from structures along the line of sight can introduce errors into the measurement. I use data from a survey towards known lenses in group environments to calculate the external shear in these systems, which is typically marginalized over in standard lens analyses. In three of six systems where I compare the independently-calculated environment shear to lens model shears, the quantities disagree at greater than 95% confidence. We explore possible sources of this disagreement. Using these data, I generate fiducial lines of sight and insert mock lenses with assumed input physical and cosmological parameters and find that those parameters can be recovered with {598} 5-10% scatter when uncertainties in my characterization of the environment are applied. The lenses in groups have larger bias and scatter. I predict how well new time delay lenses from LSST will constrain H0 and find that an ensemble of 500 quad lenses will recover H0 with {598} 2% bias with {598} 0.3% precision. On larger scales, galaxy cluster lenses can magnify the earliest galaxies into detectability. While past studies have focused on single massive clusters, I investigate the properties of lines of sight, or "beams", containing multiple cluster-scale halos in projection. Even for beams of similar total mass, those with multiple halos have higher lensing cross sections on average. The optimal configurations for maximizing the cross section are also those that maximize faint z {598} 10 detections. I present a new selection technique to identify beams in wide-area photometric surveys that contain high total masses and often multiple clusters in projection as traced by luminous red galaxies. I apply this technique to the Sloan Digital Sky Survey and present the 200 most promising beams. Several are confirmed spectroscopically to be among the highest mass beams known with some containing multiple clusters. These are among the best fields to search for faint high-redshift galaxies.

Clusters of Galaxies: Physics and Cosmology

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Publisher : Springer
ISBN 13 : 9789402417364
Total Pages : 535 pages
Book Rating : 4.4/5 (173 download)

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Book Synopsis Clusters of Galaxies: Physics and Cosmology by : Andrei M. Bykov

Download or read book Clusters of Galaxies: Physics and Cosmology written by Andrei M. Bykov and published by Springer. This book was released on 2020-10-31 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clusters of galaxies are large assemblies of galaxies, hot gas and dark matter bound together by gravity. Galaxy clusters are now one of the most important cosmological probes to test the standard cosmological models. Constraints on the Dark Energy equation of state from the cluster number density measurements, deviations from the Gaussian perturbation models, the Sunyaev-Zeldovich effect as well as the dark matter proles are among the issues to be studied with clusters. The baryonic composition of clusters is dominated by hot gas that is in quasi-hydrostatic equilibrium within the dark matter-dominated gravitational potential well of the cluster. The hot gas is visible through spatially extended thermal X-ray emission, and it has been studied extensively both for assessing its physical properties and as a tracer of the large-scale structure of the Universe. Magnetic fields as well as a number of non-thermal plasma processes play a role in clusters of galaxies as we observe from radioastronomical observations. The goal of this volume is to review these processes and to investigate how they are interlinked. Overall, these papers provide a timely and comprehensive review of the multi-wavelength observations and theoretical understanding of clusters of galaxies in the cosmological context. Thus, the volume will be particularly useful to postgraduate students and researchers active in various areas of astrophysics and space science. Originally published in Space Science Reviews in the Topical Collection "Clusters of Galaxies: Physics and Cosmology"

Using Galaxy Clusters as Cosmic Telescopes to Probe the Epoch of Reionization

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ISBN 13 : 9780438289307
Total Pages : pages
Book Rating : 4.2/5 (893 download)

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Book Synopsis Using Galaxy Clusters as Cosmic Telescopes to Probe the Epoch of Reionization by : Austin Thomas Hoag

Download or read book Using Galaxy Clusters as Cosmic Telescopes to Probe the Epoch of Reionization written by Austin Thomas Hoag and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Epoch of Reionization (hereafter "cosmic reionization" or simply "reionization") is one of the most significant remaining puzzles in cosmic history. Occurring less than one billion years after the Big Bang, reionization likely took place shortly after the formation of the first baryonic structures such as stars, galaxies and active galactic nuclei (AGN). Reionization is therefore intimately linked to several core astronomical fields such as: stellar formation and evolution, galaxy formation and evolution, large scale structure, and the cosmic microwave background, to name a few. In the last decade, significant investments have been made to observe galaxies during reionization, for example in the optical and near infrared with the Hubble Ultra-Deep Field, the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey, and the Hubble Frontier Fields. Experiments at radio frequencies have recently been undertaken to detect the global 21 cm signal expected from reionization, for example the Experiment to Detect the Global Epoch of reionization Signature, as well as to measure the power spectrum of the 21 cm radiation, such as the Murchison Wide Field Array and the Low-Frequency Array. While reionization has been a major focus in astronomy for over a decade, many key properties of the process are still uncertain. The main difficulty in constraining reionization is the faintness of the sources likely driving it, i.e. the first galaxies and AGN. Even with the most powerful current telescopes such as Keck and the Hubble Space Telescope (HST), observing all but the brightest of these sources is too expensive. Using a galaxy cluster as a gravitational lens, this observational challenge can be somewhat eased. In order to take advantage of cluster lensing to study faint galaxies, a gravitational lens model is required. In this dissertation, I present gravitational lens models I developed for 11 galaxy clusters in three large cluster surveys undertaken with the Hubble Space Telescope and the Spitzer Space Telescope. I selected redshift (z) 7 to 8 galaxies behind all of these clusters and followed them up with the Multi-Object Spectrometer For InfraRed Exploration (MOSFIRE) on the Keck I telescope. During this spectroscopic campaign I discovered a Lyman-alpha emitting galaxy at z=7.64 magnified by a factor of approximately 10. Its intrinsic luminosity is an order of magnitude fainter than the handful of other known Lyman-alpha emitters (LAEs) at z>7.5, all of which are bright, rare sources. While exhibiting weaker Lyman-alpha than the UV-brighter LAEs at z>7.5, the underlying mechanism which allows Lyman-alpha to escape all of these galaxies may be the same. I also obtained the tightest spectroscopic constraints on the redshift of one of the highest redshift gravitationally lensed galaxies (z~9) using ultra-deep grism spectroscopy from the Hubble Space Telescope. Using a sub-sample consisting of 8 out of 11 of these clusters for which the photometric analysis is complete, I constrained the fraction of Lyman-break galaxies showing Lyman-alpha, often just called the "Lyman-alpha fraction test," at z=8, making the first definitive measurement of a declining Lyman-alpha fraction (and hence increasing neutral hydrogen fraction) over the interval z=7-8 for UV-fainter galaxies. This is the first hint that faint galaxies suffer a similarly large decline in Lyman-alpha fraction as bright galaxies over this interval, suggesting that the overlap phase of reionization may still be underway at z=8.

Multiwavelength Cosmology

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Publisher : Springer Science & Business Media
ISBN 13 : 0306485702
Total Pages : 353 pages
Book Rating : 4.3/5 (64 download)

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Book Synopsis Multiwavelength Cosmology by : Manolis Plionis

Download or read book Multiwavelength Cosmology written by Manolis Plionis and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent scientific efforts in Astrophysics & Cosmology have brought a revolution to our understanding of the Cosmos. Amazing results is the outcome of amazing experiments! The huge scientific, technological & financial effort that has gone into building the 10-m class telescopes as well as many space and balloon observatories, essential to observe the multitude of cosmic phenomena in their manifestations at different wavelengths, from gamma-rays to the millimetre and the radio, has given and is still giving its fruits of knowledge. These recent scientific achievements in Observational and Theoretical Cosmology were presented in the "Multiwavelength Cosmology" conference that took place on beautiful Mykonos island in the Aegean between 17 and 20 June 2003. More than 180 Cosmologists from all over the world gathered for a four-day intense meeting in which recent results from large ground based surveys (AAT/2-df, SLOAN) and space missions (WMAP, Chandra, XMM, ISO, HST) were presented and debated, providing a huge impetus to our knowledge of the Cosmos. The future of the subject (experiments, and directions of research) was also discussed. The conference was devoted mostly on the constraints on Cosmological models and galaxy formation theories that arise from the study of the high redshift Universe, from clusters of galaxies, and their evolution, from the cosmic microwave background, the large-scale structure and star-formation history.

Cosmology with Clusters of Galaxies

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Publisher : Nova Science Publishers
ISBN 13 : 9781634821070
Total Pages : 0 pages
Book Rating : 4.8/5 (21 download)

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Book Synopsis Cosmology with Clusters of Galaxies by : Sandor Mihaly Molnar

Download or read book Cosmology with Clusters of Galaxies written by Sandor Mihaly Molnar and published by Nova Science Publishers. This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive review of the methods applied to derive cosmological parameters for a given model and test different cosmological models using the most massive collapsed structures in our Universe: clusters of galaxies. Clusters typically consist of hundreds of galaxies and high-temperature ionised gas trapped in their gravitational field dominated by dark matter extending out to 2-3 Mpc. The formation, evolution, and structure of these massive rare objects are sensitive probes of the assumed cosmology. This is a multidisciplinary field of astrophysics involving multi-wavelength observations, gravity theory, atomic physics, plasma physics, magneto-hydrodynamics, astrophysical cosmology and numerical simulations. Our understanding of the physics of clusters, which is essential when using them for cosmology, has been improved tremendously due to the recent advent of technology and observational strategy in multi-frequency observations, and enhanced by improved numerical simulations made possible by more advanced high performance computers. As a result of these developments, cosmology with clusters of galaxies has become a mature discipline recently, and provided an important contribution to establish our concordance cosmological constant dominated cold dark matter model. In the near future we expect a rapid expansion of this field due to results from new cluster surveys and multi-wavelength observations. This timely volume on this exciting newly established field discusses galaxy cluster physics and provides a detailed description of using clusters to derive cosmological parameters applying accurate measurements of individual clusters as well as using clusters as a statistical tool. A detailed discussion is given on degeneracies between derived parameters and the systematic effects, which are becoming a limiting factor. An account for using clusters to test different cosmological models is also presented. This volume provides an introduction to galaxy cluster cosmology for physics and astronomy graduate students and serves as a reference source for professionals.

Dark Energy Survey, The: The Story Of A Cosmological Experiment

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Publisher : World Scientific
ISBN 13 : 1786348373
Total Pages : 445 pages
Book Rating : 4.7/5 (863 download)

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Book Synopsis Dark Energy Survey, The: The Story Of A Cosmological Experiment by : Ofer Lahav

Download or read book Dark Energy Survey, The: The Story Of A Cosmological Experiment written by Ofer Lahav and published by World Scientific. This book was released on 2020-08-19 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The past cultures of astronomy and physics evolved their own distinct personalities. The book describes an important milestone in the history of the unification of the two fields and provides an excellent summary of the methods used to explore one of the greatest mysteries in physics today: dark energy.'Physics TodayThis book is about the Dark Energy Survey, a cosmological experiment designed to investigate the physical nature of dark energy by measuring its effect on the expansion history of the universe and on the growth of large-scale structure. The survey saw first light in 2012, after a decade of planning, and completed observations in 2019. The collaboration designed and built a 570-megapixel camera and installed it on the four-metre Blanco telescope at the Cerro Tololo Inter-American Observatory in the Chilean Andes. The survey data yielded a three-dimensional map of over 300 million galaxies and a catalogue of thousands of supernovae. Analysis of the early data has confirmed remarkably accurately the model of cold dark matter and a cosmological constant. The survey has also offered new insights into galaxies, supernovae, stellar evolution, solar system objects and the nature of gravitational wave events.A project of this scale required the long-term commitment of hundreds of scientists from institutions all over the world. The chapters in the first three sections of the book were either written by these scientists or based on interviews with them. These chapters explain, for a non-specialist reader, the science analysis involved. They also describe how the project was conceived, and chronicle some of the many and diverse challenges involved in advancing our understanding of the universe. The final section is trans-disciplinary, including inputs from a philosopher, an anthropologist, visual artists and a poet. Scientific collaborations are human endeavours and the book aims to convey a sense of the wider context within which science comes about.This book is addressed to scientists, decision makers, social scientists and engineers, as well as to anyone with an interest in contemporary cosmology and astrophysics.Related Link(s)

Cosmological Physics

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Publisher : Cambridge University Press
ISBN 13 : 9780521422703
Total Pages : 700 pages
Book Rating : 4.4/5 (227 download)

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Book Synopsis Cosmological Physics by : J. A. Peacock

Download or read book Cosmological Physics written by J. A. Peacock and published by Cambridge University Press. This book was released on 1999 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and authoritative introduction to contemporary cosmology for advanced undergraduate and graduate students.

Modern Cosmology

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Publisher : Academic Press
ISBN 13 : 0122191412
Total Pages : 462 pages
Book Rating : 4.1/5 (221 download)

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Book Synopsis Modern Cosmology by : Scott Dodelson

Download or read book Modern Cosmology written by Scott Dodelson and published by Academic Press. This book was released on 2003-03-13 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced text for senior undergraduates, graduate students and physical scientists in fields outside cosmology. This is a self-contained book focusing on the linear theory of the evolution of density perturbations in the universe, and the anisotropiesin the cosmic microwave background.

Precision Cosmology with Galaxy Cluster Surveys

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Publisher : Stanford University
ISBN 13 :
Total Pages : 234 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Precision Cosmology with Galaxy Cluster Surveys by : Hao-Yi Wu

Download or read book Precision Cosmology with Galaxy Cluster Surveys written by Hao-Yi Wu and published by Stanford University. This book was released on 2011 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The acceleration of the universe, which is often attributed to "dark energy, " has posed one of the main challenges to fundamental physics. Galaxy clusters provide one of the most sensitive probes of dark energy because their abundance reflects the growth rate of large-scale structure and the expansion rate of the universe. Several large galaxy cluster surveys will soon provide tremendous statistical power to constrain the properties of dark energy; however, the constraining power of these surveys will be determined by how well systematic errors are controlled. Of these systematic errors, the dominant one comes from inferring cluster masses using observable signals of clusters, the so-called "observable--mass distribution." This thesis focuses on extracting dark energy information from forthcoming large galaxy cluster surveys, including how we maximize the cosmological information, how we control important systematics, and how precisely we need to calibrate theoretical models. We study how multi-wavelength follow-up observations can improve cluster mass calibration in optical surveys. We also investigate the impact of theoretical uncertainties in calibrating the spatial distributions of galaxy clusters on dark energy constraints. In addition, we explore how the formation history of galaxy clusters impacts the self-calibration of cluster mass. In addition, we use N-body simulations to develop a new statistical sample of cluster-size halos in order to further understand the observable--mass distribution. We study the completeness of subhalos in our cluster sample by comparing them with the satellite galaxies in the Sloan Digital Sky Survey. We also study how subhalo selections impact the inferred correlation between formation time and optical mass tracers, including cluster richness and velocity dispersion.

Impact of Gravitational Lensing on Cosmology (IAU S225)

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Publisher : Cambridge University Press
ISBN 13 : 9780521851961
Total Pages : 478 pages
Book Rating : 4.8/5 (519 download)

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Book Synopsis Impact of Gravitational Lensing on Cosmology (IAU S225) by : International Astronomical Union. Symposium

Download or read book Impact of Gravitational Lensing on Cosmology (IAU S225) written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2005-09-05 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the International Astronomical Union Symposium no. 225, held in July 2004 at the Ecole Polytechnique Federale de Lausanne (EPFL), in Lausanne, Switzerland. The meeting focused on the applications of gravitational lensing to cosmological physics, and this book summarizes the most recent theoretical and observational developments. With chapters written by leading scientists in the field, this is a valuable resource for professional astronomers and graduate students in astronomy, physics and astro-particle physics.

A Galaxy Cluster Finding Algorithm for Large-scale Photometric Surveys

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis A Galaxy Cluster Finding Algorithm for Large-scale Photometric Surveys by : Leon Baruah

Download or read book A Galaxy Cluster Finding Algorithm for Large-scale Photometric Surveys written by Leon Baruah and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Camera Systematics and Three-point Correlations in Modern Photometric Galaxy Surveys

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (113 download)

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Book Synopsis Camera Systematics and Three-point Correlations in Modern Photometric Galaxy Surveys by : Michael A Baumer

Download or read book Camera Systematics and Three-point Correlations in Modern Photometric Galaxy Surveys written by Michael A Baumer and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of modern cosmology, broadly speaking, is to understand the behavior of the Universe at large scales, including the evolution of dark matter and dark energy over cosmic time. In the context of the modern paradigm of a universe dominated by dark energy and cold dark matter (LCDM), the goal is to detect deviations from LCDM predictions (new physics), and in the absence of those, to infer the value of the LCDM parameters. Advances this endeavor will require both improved constraints on systematic errors in raw astronomical data as well as improved statistical methods for extracting cosmological information from galaxy catalogs. Toward these ends, the first half of this thesis discusses methods for improving our ability to make precise and accurate measurements of galaxies in the universe using astronomical CCD imaging cameras. The second half of this thesis discusses a novel application of a statistical probe of the cosmic web of dark matter, the galaxy three-point correlation function, to photometric galaxy surveys, that allows us to extract more information of cosmological interest from the observed galaxy distribution. Both lines of research discussed in this thesis will be useful in future analyses of data from upcoming optical galaxy surveys, including the Large Synoptic Survey Telescope.

Questions of Modern Cosmology

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Publisher : Springer Science & Business Media
ISBN 13 : 3642007929
Total Pages : 552 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Questions of Modern Cosmology by : Mauro D'Onofrio

Download or read book Questions of Modern Cosmology written by Mauro D'Onofrio and published by Springer Science & Business Media. This book was released on 2009-07-09 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are we living in the "golden age" of cosmology? Are we close to understanding the nature of the unknown ingredients of the currently most accepted cosmological model and the physics of the early Universe? Or are we instead approaching a paradigm shift? What is dark matter and does it exist? How is it distributed around galaxies and clusters? Is the scientific community open to alternative ideas that may prompt a new scientific revolution - as the Copernican revolution did in Galileo's time? Do other types of supernovae exist that can be of interest for cosmology? Why have quasars never been effectively used as standard candles? Can you tell us about the scientific adventure of COBE? How does the extraction of the Cosmic Microwave Background anisotropy depend on the subtraction of the various astrophysical foregrounds? These, among many others, are the astrophysical, philosophical and sociological questions surrounding modern cosmology and the scientific community that Mauro D'Onofrio and Carlo Burigana pose to some of the most prominent cosmologists of our time. Triggered by these questions and in the spirit of Galileo's book "Dialogue Concerning the Two Chief World Systems" the roughly 40 interview partners reply in the form of essays, with a critical frankness not normally found in reviews, monographs or textbooks.

The RedMaPPer Galaxy Cluster Catalog From DES Science Verification Data

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis The RedMaPPer Galaxy Cluster Catalog From DES Science Verification Data by :

Download or read book The RedMaPPer Galaxy Cluster Catalog From DES Science Verification Data written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to $150\,\mathrm{deg}2̂$ of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited, and contains 786 clusters with richness $\lambda>20$ (roughly equivalent to $M_{\mathrm{500c}}\gtrsim10\̂,h_{70}{̂-1}\,M_{\odot}$) and 0.2

New Worlds, New Horizons in Astronomy and Astrophysics

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Publisher : National Academies Press
ISBN 13 : 0309157994
Total Pages : 324 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis New Worlds, New Horizons in Astronomy and Astrophysics by : National Research Council

Download or read book New Worlds, New Horizons in Astronomy and Astrophysics written by National Research Council and published by National Academies Press. This book was released on 2011-02-04 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven by discoveries, and enabled by leaps in technology and imagination, our understanding of the universe has changed dramatically during the course of the last few decades. The fields of astronomy and astrophysics are making new connections to physics, chemistry, biology, and computer science. Based on a broad and comprehensive survey of scientific opportunities, infrastructure, and organization in a national and international context, New Worlds, New Horizons in Astronomy and Astrophysics outlines a plan for ground- and space- based astronomy and astrophysics for the decade of the 2010's. Realizing these scientific opportunities is contingent upon maintaining and strengthening the foundations of the research enterprise including technological development, theory, computation and data handling, laboratory experiments, and human resources. New Worlds, New Horizons in Astronomy and Astrophysics proposes enhancing innovative but moderate-cost programs in space and on the ground that will enable the community to respond rapidly and flexibly to new scientific discoveries. The book recommends beginning construction on survey telescopes in space and on the ground to investigate the nature of dark energy, as well as the next generation of large ground-based giant optical telescopes and a new class of space-based gravitational observatory to observe the merging of distant black holes and precisely test theories of gravity. New Worlds, New Horizons in Astronomy and Astrophysics recommends a balanced and executable program that will support research surrounding the most profound questions about the cosmos. The discoveries ahead will facilitate the search for habitable planets, shed light on dark energy and dark matter, and aid our understanding of the history of the universe and how the earliest stars and galaxies formed. The book is a useful resource for agencies supporting the field of astronomy and astrophysics, the Congressional committees with jurisdiction over those agencies, the scientific community, and the public.

Scientific and Technical Aerospace Reports

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Publisher :
ISBN 13 :
Total Pages : 836 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt: