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Gaseous Halos Of Galaxies
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Book Synopsis Gaseous Halos of Galaxies by : National Radio Astronomy Observatory (Estados Unidos) Workshop
Download or read book Gaseous Halos of Galaxies written by National Radio Astronomy Observatory (Estados Unidos) Workshop and published by . This book was released on 1985 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Neutral Gaseous Halos of Milky Way-type Galaxies by : Eric D. Miller
Download or read book The Neutral Gaseous Halos of Milky Way-type Galaxies written by Eric D. Miller and published by . This book was released on 2003 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gaseous Halos of Galaxies by : Joel N. Bregman
Download or read book Gaseous Halos of Galaxies written by Joel N. Bregman and published by . This book was released on 1986 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiphase Gaseous Halos Around Galaxies by : Cameron Jia Liang
Download or read book Multiphase Gaseous Halos Around Galaxies written by Cameron Jia Liang and published by . This book was released on 2018 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is no doubt that our atmosphere is an integral part of the ecosystem of the Earth. Everyday weather and long-term climate of the atmosphere are directly linked to activities on the surface of the Earth and vice versa. Gaseous halos, known as the circumgalactic medium (CGM), are the equivalent atmospheres of galaxies. The cycles of birth and death of stars are intricately tied to the cycle of gaseous structures in the galactic sky. This dissertation provides a major step towards characterizing and modeling the physical properties of the CGM and the co-evolution with their host galaxies. First, we statistically map the spatial extents of the CGM in ~200 galaxies that span a large range of stellar mass. This mapping shows a continuous detection of neutral hydrogen out to 10 virial radii of the host galaxies while heavy elements are detected only up to 50%-70% of the virial radius. We explore the effects on the CGM profiles from different modeling of star formation and feedback processes using a set of high-resolution cosmological zoom-in simulations of a Milk-Way progenitor. This comparison illustrates that the properties of galaxies and the properties of their CGM provide strong complementary constraints on the processes governing galaxy formation. We show that the spatial profiles are self-similar across halo mass and cosmic time once it is re-normalized by the scaled radius of the host dark matter halo. To connect more closely with observations, we develop a synthetic absorption pipeline, as a virtual telescope, to observe the simulated galaxy and their CGM. Finally, using semi-analytic calculations, and a set of magnetohydrodynamic simulations, we present a multiphase model of the gaseous halos around galaxies, the circumgalactic mist. The model implies a large number of cold clumps in the inner halo with a small volume filling factor but a large covering fraction. The model naturally gives rise to spatial extents and differential covering fractions of cold, warm and hot gas. To self-consistently model the co-evolution of the CGM and star formation within galaxies, future simulations must address the mismatch of the spatial resolution and characteristic scale of cold gas.
Book Synopsis The Formation and Disruption of Black Hole Jets by : Ioannis Contopoulos
Download or read book The Formation and Disruption of Black Hole Jets written by Ioannis Contopoulos and published by Springer. This book was released on 2014-11-10 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the phenomenology displayed by relativistic jets as well as the most recent theoretical efforts to understand the physical mechanisms at their origin. Relativistic jets have been observed and studied in Active Galactic Nuclei (AGN) for about half a century and are believed to be fueled by accretion onto a supermassive black hole at the center of the host galaxy. Since the first discovery of relativistic jets associated with so-called "micro-quasars" much more recently, it has seemed clear that much of the physics governing the relativistic outflows in stellar X-ray binaries harboring black holes and in AGN must be common, but acting on very different spatial and temporal scales. With new observational and theoretical results piling up every day, this book attempts to synthesize a consistent, unified physical picture of the formation and disruption of jets in accreting black-hole systems. The chapters in this book offer overviews accessible not only to specialists but also to graduate students and astrophysicists working in other areas. Covered topics comprise Relativistic jets in stellar systems Launching of AGN jets Parsec-scale AGN jets Kiloparsec-scale AGN jets Black hole magnetospheres Theory of relativistic jets The structure and dynamics of the inner accretion disk The origin of the jet magnetic field X-ray observations, phenomenology, and connection with theory
Book Synopsis Metal Enriched Gaseous Halos Around Distant Radio Galaxies by :
Download or read book Metal Enriched Gaseous Halos Around Distant Radio Galaxies written by and published by . This book was released on 2006 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of an optical and near-IR spectroscopic study of giant nebular emission line halos associated with three z> 3 radio galaxies, 4C 41.17, 4C 60.07 and B2 0902+34. Previous deep narrow band Ly[alpha] imaging had revealed complex morphologies with sizes up to 100 kpc, possibly connected to outflows and AGN feedback from the central regions. The outer regions of these halos show quiet kinematics with typical velocity dispersions of a few hundred km s−1, and velocity shears that can mostly be interpreted as being due to rotation. The inner regions show shocked cocoons of gas closely associated with the radio lobes. These display disturbed kinematics and have expansion velocities and/or velocity dispersions>1000 km s−1. The core region is chemically evolved, and we also find spectroscopic evidence for the ejection of enriched material in 4C 41.17 up to a distance of H"60 kpc along the radio-axis. The dynamical structures traced in the Ly[alpha] line are, in most cases, closely echoed in the Carbon and Oxygen lines. This shows that the Ly[alpha] line is produced in a highly clumped medium of small filling factor, and can therefore be used as a tracer of the dynamics of HzRGs. We conclude that these HzRGs are undergoing a final jet-induced phase of star formation with ejection of most of their interstellar medium before becoming 'red and dead' Elliptical galaxies.
Book Synopsis Introduction to Galaxy Formation and Evolution by : Andrea Cimatti
Download or read book Introduction to Galaxy Formation and Evolution written by Andrea Cimatti and published by Cambridge University Press. This book was released on 2019-10-17 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Present-day elliptical, spiral and irregular galaxies are large systems made of stars, gas and dark matter. Their properties result from a variety of physical processes that have occurred during the nearly fourteen billion years since the Big Bang. This comprehensive textbook, which bridges the gap between introductory and specialized texts, explains the key physical processes of galaxy formation, from the cosmological recombination of primordial gas to the evolution of the different galaxies that we observe in the Universe today. In a logical sequence, the book introduces cosmology, illustrates the properties of galaxies in the present-day Universe, then explains the physical processes behind galaxy formation in the cosmological context, taking into account the most recent developments in this field. The text ends on how to find distant galaxies with multi-wavelength observations, and how to extract the physical and evolutionary properties based on imaging and spectroscopic data.
Book Synopsis Galaxy Formation and Evolution by : Houjun Mo
Download or read book Galaxy Formation and Evolution written by Houjun Mo and published by Cambridge University Press. This book was released on 2010-05-20 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coherent introduction for researchers in astronomy, particle physics, and cosmology on the formation and evolution of galaxies.
Book Synopsis The Cluster Environments and Gaseous Halos of Distant Radio Galaxies by : Jaron Daniël Kurk
Download or read book The Cluster Environments and Gaseous Halos of Distant Radio Galaxies written by Jaron Daniël Kurk and published by . This book was released on 2003 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties and Evolution of the Gaseous Galactic Halos in Galaxy Formation Simulations by : Aleksandra Sokolowska
Download or read book Properties and Evolution of the Gaseous Galactic Halos in Galaxy Formation Simulations written by Aleksandra Sokolowska and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Absorption Characteristics of Gaseous Galaxy Halos in the Local Universe by : Peter Herenz
Download or read book A Study of the Absorption Characteristics of Gaseous Galaxy Halos in the Local Universe written by Peter Herenz and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Galaxies and Their Masks by : David L. Block
Download or read book Galaxies and Their Masks written by David L. Block and published by Springer. This book was released on 2016-04-01 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: The year: 1660. The date: November 28. Present: The Lord Brouncker, Mr Boyle, Mr Bruce, Sir Robert Moray, Sir Paule Neile, Dr Wilkins, Dr Goddard, Dr Petty, Mr Ball, Mr Hooke, Mr Wren, and Mr Hill. Occasion: A lecture by Mr Wren at Gresham College, United Kingdom. AfterChristopherWrenhaddeliveredhislectureatGreshamCollegeonthathistoric occasion in November 1660, they did according to the usual manner, withdraw for mutual converse. It was in 1660 that the Royal Society was founded, with 12 persons present. This year, 2010, is thus a special year for scientists worldwide: it celebrates the 350th anniversary of the founding of the Royal Society, whose current President is Martin Rees. One of the enormous challenges facing scientists in the 1600s was the great need fortheclassi cationofobjectstheywerestudying, particularlyinthe eldofbotany. The seeds for classi cation lie in the works of the British naturalist John Ray (1628 1705), who commencing in 1660 with hisCatalogusplantarumcirca Cantabrigiamnascentium (Catalogue of Cambridge Plants) published in the year in which the Royal Society was founded and ending with the posthumous publi- tion ofSynopsisMethodicaAviumetPiscium in 1713, pioneered systematic studies on plants, birds, mammals, sh, and insects."
Book Synopsis Galaxy Formation and Evolution by : Houjun Mo
Download or read book Galaxy Formation and Evolution written by Houjun Mo and published by Cambridge University Press. This book was released on 2010-05-20 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly expanding field of galaxy formation lies at the interface between astronomy, particle physics, and cosmology. Covering diverse topics from these disciplines, all of which are needed to understand how galaxies form and evolve, this book is ideal for researchers entering the field. Individual chapters explore the evolution of the Universe as a whole and its particle and radiation content; linear and nonlinear growth of cosmic structure; processes affecting the gaseous and dark matter components of galaxies and their stellar populations; the formation of spiral and elliptical galaxies; central supermassive black holes and the activity associated with them; galaxy interactions; and the intergalactic medium. Emphasizing both observational and theoretical aspects, this book provides a coherent introduction for astronomers, cosmologists, and astroparticle physicists to the broad range of science underlying the formation and evolution of galaxies.
Book Synopsis Galaxies and Gas in Dark Matter Halos and the Cosmic Web by : Seunghwan Lim
Download or read book Galaxies and Gas in Dark Matter Halos and the Cosmic Web written by Seunghwan Lim and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the current understanding of galaxy formation, galaxies are believed to form and evolve in dark matter halos. The dark matter halos are collapsed objects that form and grow via gravitational instability of small initial density fluctuation in the cosmic field. They are not only the hosts of galaxies but are tracers of the cosmic web of the Universe. They are thus crucial components for understanding how galaxies form and evolve within the cosmic web. This dissertation is a systematic investigation of the galaxies and gas in the dark matter halos and the cosmic web, using observation data of large galaxy surveys such as the Sloan Digital Sky Survey (SDSS), and of the Cosmic Microwave Background (CMB) survey such as the Planck, together with simulations and modellings for comparison and interpretation. Specifically, we have identified dark matter halos in the low-redshift Universe, and constructed the largest to date all-sky group catalog. We also investigated correlations between many of the galaxy and halo properties, particularly finding, for the first time, an observational proxy of halo age. Then, I developed a series of novel approaches to maximize the detection of the Sunyaev-Zel'dovich effect (SZE), and from it explored the gas properties in halos to find that the gas mass fraction even in Milky Way-size halos is about the cosmic mean fraction. The analysis identified the baryons in a warm-hot medium on halo scales. We also show that the thermal SZE can be used to constrain the mean relationship between thermal energy of IGM gas and local total matter density for the first time. We support the reliability of our methods and results with tests where the methods are applied to the mock CMB maps constructed from simulations. Finally, we present comparisons with simulations of the SZE, and discuss the implications for its constraining power of galaxy formation models.
Book Synopsis On the Origin (and Evolution) of Baryonic Galaxy Halos by :
Download or read book On the Origin (and Evolution) of Baryonic Galaxy Halos written by and published by . This book was released on 2018-02-08 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers aspects and achievements of the baryonic (star and gas) component of galaxy halos as presented at the successful conference "On the Origin (and Evolution) of Baryonic Galaxy Halos," held on the Galapagos Islands, Ecuador, March 13-17, 2017. It can be regarded as a compendium of the prominent results in this field. The main focus is the latest simulations and observations of galaxy halos. This compendium is recommended to researchers, and advanced students, as it contains peer-reviewed high quality papers that will meet their scientific needs and help to initiate new research directions. Everything described in this book is the result of a truly collective effort from the participants of the Galapagos conference.
Book Synopsis The Physics of Galactic Halos by : Harald Lesch
Download or read book The Physics of Galactic Halos written by Harald Lesch and published by Wiley-VCH. This book was released on 1997-04-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains new observational results which help to illuminate the hydrodynamic and the magnetohydrodynamic interactions between the disk and halo of our Galaxy and other galaxies from various aspect angles. In particular, the recent discovery of an X-ray corona of our Galaxy and the relation of its X-ray emission to observed impacts of intergalactic gas clouds onto the gaseous galactic disk has motivated the development of new theoretical models. Among these are models for galactic winds, galactic fountains, acceleration of low-energy cosmic ray particles in turbulent velocity fields, magnetic reconnection in the boundary layers of colliding interstellar gas clouds and complete evolutionary scenarios for galactic halos. Finally, the book contains the most up-to-date information about the very popular subject of halo research, the illusive dark matter and the different ways in which dark matter may be hiding from us.
Book Synopsis The Dynamic Ionized Gas Halos of Spiral Galaxies by : Joseph Andrew Collins
Download or read book The Dynamic Ionized Gas Halos of Spiral Galaxies written by Joseph Andrew Collins and published by . This book was released on 2001 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
