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Author : Olivera Rakic
Publisher :
ISBN 13 : 9789461911681
Total Pages : 137 pages
Book Rating : 4.9/5 (116 download)
Download or read book The Intergalactic Medium Near High-redshift Galaxies written by Olivera Rakic and published by . This book was released on 2012 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Space Telescope Science Institute (U.S.). Symposium
Publisher : Cambridge University Press
ISBN 13 : 9780521630979
Total Pages : 328 pages
Book Rating : 4.6/5 (39 download)
Download or read book The Hubble Deep Field written by Space Telescope Science Institute (U.S.). Symposium and published by Cambridge University Press. This book was released on 1998-10-13 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hubble Deep Field (HDF) is the deepest optical image of the Universe ever obtained. It is the result of a 150-orbit observing programme with the Hubble Space Telescope. It provides a unique resource for researchers studying the formation and evolution of stars and galaxies. This timely volume provides the first comprehensive overview of the HDF and its scientific impact on our understanding in cosmology. It presents articles by a host of world experts who gathered together at an international conference at the Space Telescope Science Institute. The contributions combine observations of the HDF at a variety of wavelengths with the latest theoretical progress in our understanding of the cosmic history of star and galaxy formation. The HDF is set to revolutionize our understanding in cosmology. This book therefore provides an indispensable reference for all graduate students and researchers in observational or theoretical cosmology.
Author : Koki Kakiichi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (957 download)
Download or read book The High Redshift Universe written by Koki Kakiichi and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Immo Appenzeller
Publisher : Springer Science & Business Media
ISBN 13 : 3540758240
Total Pages : 353 pages
Book Rating : 4.5/5 (47 download)
Download or read book High-Redshift Galaxies written by Immo Appenzeller and published by Springer Science & Business Media. This book was released on 2009-06-17 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high-redshift galaxies became a distinct research ?eld during the ?nal decade of the20thcentury. AtthattimetheLyman-breaktechniquemadeitpossibletoidentify signi?cant samples of such objects, and the new generation of 8 to 10-m telescopes resulted in ?rst good spectroscopic data. Today the high-redshift galaxies have developed into one of the important topics of astrophysics, accounting for about 5–10% of the publications in the major scienti?c journals devoted to astronomy. Because high-redshift galaxies is a rapidly developing ?eld and since new results are published constantly, writing a book on this topic is challenging. On the other hand, in view of the large amount of individual results now in the literature, and in view of the still growing interest in this topic, it appears worthwhile to summarize and evaluate the available data and to provide an introduction for those who wish to enter this ?eld, or who, for various reasons, might be interested in its results. The end of the ?rst decade of the 21st century appears to be a good point in time to attempt such a summary. The current generation of ground-based 8 to 10-m - optical telescopes, the Hubble Space Telescope, and the most important large radio telescopes have by now been in operation since about one or two decades. Although these instruments will continue to produce important scienti?c results for some time to come, many of the initial programs exploiting their unique new possibilities have been completed.
Author : Jacqueline Bergeron
Publisher : Atlantica Séguier Frontières
ISBN 13 : 9782863320518
Total Pages : 548 pages
Book Rating : 4.3/5 (25 download)
Download or read book High Redshift and Primeval Galaxies written by Jacqueline Bergeron and published by Atlantica Séguier Frontières. This book was released on 1987 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Romain A. Meyer
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (13 download)
Download or read book The Role of Galaxies and Quasars in Reionising the High Redshift Intergalactic Medium written by Romain A. Meyer and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark Dijkstra
Publisher :
ISBN 13 :
Total Pages : 416 pages
Book Rating : 4.:/5 (653 download)
Download or read book Constraints on High Redshift Galaxy Formation and Its Impact on the Intergalactic Medium written by Mark Dijkstra and published by . This book was released on 2005 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Patrick Petitjean
Publisher : Atlantica Séguier Frontières
ISBN 13 : 9782863322291
Total Pages : 490 pages
Book Rating : 4.3/5 (222 download)
Download or read book Structure and Evolution of the Intergalactic Medium from QSO Absorption Line Systems written by Patrick Petitjean and published by Atlantica Séguier Frontières. This book was released on 1997 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Raymond F Bonn
Publisher : Lulu.com
ISBN 13 : 0578026252
Total Pages : 687 pages
Book Rating : 4.5/5 (78 download)
Download or read book Cosmological Effects of Scattering in the Intergalactic Medium written by Raymond F Bonn and published by Lulu.com. This book was released on 2011-04-01 with total page 687 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an explanation of electromagnetic scattering effects in the intergalactic medium that produce what have been misinterpreted as 'evolutionary' effects. It accounts for a variety of cosmological phenomena from spectroscopic redshifts to microwave background radiation. These have variously been attributed by the standard cosmological model to an origin in a 'big bang', 'dark matter', and mysterious 'vacuum energy'. This scattering model provides a viable stationary state alternative to the established view of the universe with predictions that more precisely match observation without ad hoc assumptions.
Author : Juna Ariele Kollmeier
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (822 download)
Download or read book The Intergalactic Medium written by Juna Ariele Kollmeier and published by . This book was released on 2006 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Two fundamental predictions of modern cosmological models are that i) galaxies form from small perturbations in the cosmic density field and ii) there is a tenuous medium between the galaxies that traces the underlying dark matter distribution in a relatively simple way. This thesis concerns the structure of the intergalactic medium (IGM) and its relation to galaxies. Specifically, I analyze the nature of the IGM, observable via the Lyman-alpha transition of hydrogen, as predicted from cosmological hydrodynamic simulations of a cold dark matter + dark energy universe. I first quantify the relation between galaxies and absorption in the Lyman-alpha forest on large (~10 Megaparsec) and small (~0.5 Megaparsec) scales and show that, in the absence of feedback from the galaxies themselves, observations of this relation can serve as robust tests of the inflationary cold dark matter model. I show that the strong bias of high redshift galaxies toward high density regions imprints a clear signature on the distribution of flux in the Lyman-alpha forest, and these predictions are examined as functions of galaxy baryon mass, star formation rate, and dark matter halo mass and occupation. I then investigate the potential impact of galaxies on the IGM and find that supernova-driven winds (as predicted in cosmological simulations) can substantially impact their local surroundings, particularly via heating, but that only very powerful winds can create easily detectable "holes'" in the IGM. The impact of winds on the Lyman-alpha optical depth near galaxies is less dramatic than their impact on gas temperature because winds heat only a small fraction of the gas present in the turnaround regions surrounding galaxies, all of which contribute to the Lyman-alpha forest near galaxies. Finally, I combine a Monte Carlo radiative transfer code with cosmological hydrodynamic simulations to investigate the signature of fluorescent Lyman-alpha emission from large scale structure due to impinging radiation from the metagalactic ionizing background as well as local bright sources such as quasars. I compare these predictions with current observations and discuss future observing campaigns and realistic strategies for detecting fluorescence from the ambient metagalactic ionization as well as in the vicinity of bright quasars.
Author : Charles Colville Steidel
Publisher :
ISBN 13 :
Total Pages : 570 pages
Book Rating : 4.:/5 (4 download)
Download or read book Spectroscopic Observations of High Redshift QSOs written by Charles Colville Steidel and published by . This book was released on 1990 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jelle Kaastra
Publisher : Springer Science & Business Media
ISBN 13 : 0387788751
Total Pages : 418 pages
Book Rating : 4.3/5 (877 download)
Download or read book Clusters of Galaxies: Beyond the Thermal View written by Jelle Kaastra and published by Springer Science & Business Media. This book was released on 2008-05-01 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: The existence of soft excess emission originating from clusters of galaxies, de ned as em- sion detected below 1 keV in excess over the usual thermal emission from hot intracluster gas (hereafter the ICM) has been claimed since 1996. Soft excesses are particularly - portant to detect because they may (at least partly) be due to thermal emission from the Warm-Hot Intergalactic Medium, where as much as half of the baryons of the Universe could be. They are therefore of fundamental cosmological importance. Soft excess emission has been observed (and has also given rise to controversy) in a number of clusters, mainly raising the following questions: (1) Do clusters really show a soft excess? (2) If so, from what spatial region(s) of the cluster does the soft excess or- inate? (3) Is this excess emission thermal, originating from warm-hot intergalactic gas (at 6 temperatures of?10 K), or non-thermal, in which case several emission mechanisms have been proposed. Interestingly, some of the non-thermal mechanisms suggested to account for soft excess emission can also explain the hard X-ray emission detected in some clusters, for example by RXTE and BeppoSAX (also see Petrosian et al. 2008—Chap. 10, this issue; Rephaeli et al. 2008—Chap. 5, this issue).
Author : Oddbjørn Engvold Bozena Czerny, John Lattanzio and Rolf Stabell
Publisher : EOLSS Publications
ISBN 13 : 1780210019
Total Pages : 488 pages
Book Rating : 4.7/5 (82 download)
Download or read book Astronomy and Astrophysics - Volume II written by Oddbjørn Engvold Bozena Czerny, John Lattanzio and Rolf Stabell and published by EOLSS Publications. This book was released on 2012-11-30 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Abraham Loeb
Publisher : Princeton University Press
ISBN 13 : 0691144923
Total Pages : 572 pages
Book Rating : 4.6/5 (911 download)
Download or read book The First Galaxies in the Universe written by Abraham Loeb and published by Princeton University Press. This book was released on 2013-01-15 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive, self-contained introduction to one of the most exciting frontiers in astrophysics today: the quest to understand how the oldest and most distant galaxies in our universe first formed. Until now, most research on this question has been theoretical, but the next few years will bring about a new generation of large telescopes that promise to supply a flood of data about the infant universe during its first billion years after the big bang. This book bridges the gap between theory and observation. It is an invaluable reference for students and researchers on early galaxies. The First Galaxies in the Universe starts from basic physical principles before moving on to more advanced material. Topics include the gravitational growth of structure, the intergalactic medium, the formation and evolution of the first stars and black holes, feedback and galaxy evolution, reionization, 21-cm cosmology, and more. Provides a comprehensive introduction to this exciting frontier in astrophysics Begins from first principles Covers advanced topics such as the first stars and 21-cm cosmology Prepares students for research using the next generation of large telescopes Discusses many open questions to be explored in the coming decade
Author : Alessandro Boselli
Publisher : John Wiley & Sons
ISBN 13 : 3527640266
Total Pages : 343 pages
Book Rating : 4.5/5 (276 download)
Download or read book A Panchromatic View of Galaxies written by Alessandro Boselli and published by John Wiley & Sons. This book was released on 2012-01-13 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing how to investigate all kinds of galaxies through a multifrequency analysis, this text is divided into three different sections. The first describes the data currently available at different frequencies, from X-rays to UV, optical, infrared and radio millimetric and centimetric, while explaining their physical meaning. In the second section, the author explains how these data can be used to determine physical parameters and quantities, such as mass and temperature. The final section is devoted to describing how the derived quantities can be used in a multifrequency analysis to study such physical processes as the star formation cycle and constrain models of galaxy evolution. As a result, observers will be able to interpret galaxies and their structure.
Author : Karel A. van der Hucht
Publisher : Cambridge University Press
ISBN 13 : 9780521856058
Total Pages : 488 pages
Book Rating : 4.8/5 (56 download)
Download or read book Reports on Astronomy 2006-2009 (IAU XXVIIA) written by Karel A. van der Hucht and published by Cambridge University Press. This book was released on 2009-03-23 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Transactions XXVIIA Reports on Astronomy 2006-2009 provides a comprehensive and authoritative review of what has been achieved in astronomy during the years 2006 to 2009. These insightful and up-to-date reviews have been written by the presidents and chairpersons of the IAU scientific bodies: the Divisions, the Commissions, and the Working Groups. Topics covered in this wide-ranging volume include: fundamental astronomy; the Sun and heliosphere; planetary sciences; stars; variable stars; interstellar matter; the Galactic system; galaxies and the Universe; optical and infrared techniques; radio astronomy; space and high-energy astrophysics; and other IAU activities. The reviews have been written at a level suitable for colleagues in the same fields, but will also be useful for students and researchers wishing to gain an overview of astronomical fields beyond their own research area.
Author : David Matthew French
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (18 download)
Download or read book The Circumgalactic Medium of Nearby Galaxies written by David Matthew French and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Lambda Cold-Dark-Matter cosmology predicts the growth of large scale structure from small, initial perturbations in the dark matter potential distribution. Gas in the Universe follows this dark matter potential, collapsing along a series of filaments and knots, and eventually forming galaxies. The present-day Universe is left with a rich kaleidoscope of galaxies of different types, colors, and sizes. Observations suggest, however, that the gas from which these galaxies are built continues to play a pivotal role in their evolution. Numerous studies have already found strong evidence for the spatial correlation of neutral hydrogen (\HI; $\rm Ly\alpha$ absorption being our tracer of choice here) in the intergalactic medium (IGM) and galaxies. This thesis examines how intergalactic \HI~interacts with, is influenced by, and depends on the nearby galaxies lying within it. This study is made possible by correlating the positions of archival Cosmic Origins Spectrograph (COS; Hubble Space Telescope) sightlines toward background quasi-stellar objects (QSOs) with the distributions of known galaxies within the nearby, $cz \leq 10,000$ \kms~Universe. To enable this, I compile a catalog of all known galaxies in this redshift range, and homogenized measurements of their diameters, axis ratios, position angles, and magnitudes. This effort ensures that I can compare galaxy measurements from different sources with confidence. I introduce a novel likelihood method to automate the process of matching galaxies from this catalog with nearby absorption and also to quantify the relative isolation of these absorbers versus their proximity to galaxies. To test this method, I built a pilot sample with 33 QSO sightines chosen for their proximity to large ($D \ge 25$ kpc) galaxies. In each I identify all $\rm Ly\alpha$ lines within $cz \leq 10,000$ \kms~and match each line with the highest-likelihood galaxy. I discover a preference for $\rm Ly\alpha$ to be detected near high inclination galaxies at a $3.6\sigma$ significance level. I attribute this to the combination of a $
