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Author : Ingo Misgeld
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (118 download)
Download or read book Early-type Stellar Systems in Nearby Galaxy Clusters written by Ingo Misgeld and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : N. G. Roman
Publisher : Cambridge University Press
ISBN 13 : 1107511615
Total Pages : 99 pages
Book Rating : 4.1/5 (75 download)
Download or read book Comparison of the Large-Scale Structure of the Galactic System with that of Other Stellar Systems written by N. G. Roman and published by Cambridge University Press. This book was released on 2015-05-21 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1958, this book examines the Galactic System in the light of then-recent developments in radio astronomy.
Author : John S. Mulchaey
Publisher : Cambridge University Press
ISBN 13 : 9780521755771
Total Pages : 408 pages
Book Rating : 4.7/5 (557 download)
Download or read book Clusters of Galaxies: Volume 3, Carnegie Observatories Astrophysics Series written by John S. Mulchaey and published by Cambridge University Press. This book was released on 2004-09-23 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Series of review papers covering clusters of galaxies and related phenomena.
Author : Hyron Spinrad
Publisher : Springer Science & Business Media
ISBN 13 : 3540290079
Total Pages : 202 pages
Book Rating : 4.5/5 (42 download)
Download or read book Galaxy Formation and Evolution written by Hyron Spinrad and published by Springer Science & Business Media. This book was released on 2006-08-29 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Astronomical Life – Observing the Depths of the Universe” Though science as a subject can be di?cult, what has been more important for me is that its practice can also be rewarding fun! This book is crafted to expose the reader to the excitement of modern observational cosmology through the study of galaxy evolution over space and cosmic time. Recent extragalactic research has led to many rapid advances in the ?eld. Even a suitable skeptic of certain pronouncements about the age and structure of the Universe should be pleased with the large steps that have been taken in furthering our understanding of the Universe since the early 1990’s. My personal involvement in galaxy research goes back to the 1960’s. At that point, galaxies were easily recognized and partially understood as organized c- lections of stars and gas. What their masses were presented a problem, which I supposed would just fade away. But fade it didn’t. Distant active nuclei and quasars were discovered in the mid-1960’s. A c- mon view of QSOs was that they have large redshifts, but what use are they for cosmology or normal galaxy astrophysics? I shared that conclusion. My expec- tions fell below their potential utility. In short, the Universe of our expectations rarely matches the Universe as it is discovered.
Author : Nicholas James McConnell
Publisher :
ISBN 13 :
Total Pages : 356 pages
Book Rating : 4.:/5 (858 download)
Download or read book Black Hole Masses in Nearby Brightest Cluster Galaxies written by Nicholas James McConnell and published by . This book was released on 2012 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most massive galaxies in the Universe live at the centers of galaxy clusters and exhibit a number of extreme properties. Although their evolution broadly resembles that of normal elliptical galaxies, with early gas quenching and gradual assembly from smaller stellar systems, their unique cosmic environments may have offered additional pathways for growth. The extreme stellar mass growth of BCGs is clearly demonstrated by their overall luminosities, but the growth histories and present-day masses of their central black holes are not well known. A key body of evidence for the evolutionary connections between galaxies and supermassive black holes is the set of scaling relations between black hole masses (MBH) and the stellar velocity dispersions ([sigma]), luminosities (L), or bulge masses (Mbulge) of their host galaxies. However, these scaling relations are poorly sampled for BCGs. Populating the relations with direct measurements of MBH could offer new insights to the growth of black holes and stellar systems at the hearts of galaxy clusters. Along with collaborators, I have undertaken a series of observations of the centers of BCGs, using integral-field spectrographs on the Keck, Gemini, and Harlan J. Smith telescopes. In this dissertation, I describe the measurement and analysis of stellar kinematics at the centers of five BCGs, and measurements of their black hole masses using stellar orbit models. The most notable result is the measurement of black holes with approximately 10 billion solar masses in NGC 3842 and NGC 4889. These are the largest black hole masses ever directly measured, and they significantly exceed predictions from both the MBH-[sigma] and MBH-L relations. Their masses are comparable to the biggest black holes powering high-redshift quasars, suggesting a tantalizing link between early sites of prolific black hole growth and rich galaxy clusters today. In contrast, I find that NGC 6086 and NGC 7768 host black holes with only a few billion solar masses. These measurements, as well as my upper limit for MBH in NGC 2832, are more consistent with the existing black hole scaling relations. Recent measurements by my team and others have reshaped the sample of well-measured black hole masses, introducing significant updates to previous compilations. I present a sample of 65 dynamical black hole mass measurements, compiled from published literature through May 2012. In addition to previously reported values of [sigma] and L, I have compiled an updated sample of bulge masses for 34 galaxies. The updated sample yields a steeper MBH-[sigma] relation than previous versions, while the MBH-L and MBH-Mbulge relations experience relatively small changes. I have examined the black hole scaling relations for a variety of galaxy subsamples and find noteworthy variations in the MBH-[sigma] relation for early- versus late-type galaxies and core-profile versus power-law galaxies. Using the new sample, I have measured the empirical scatter in MBH and have attempted to measure the intrinsic scatter for multiple intervals in [sigma], L, and Mbulge. This is an important step forward from previous studies, which have only measured the intrinsic scatter over the full range of a given host galaxy property. Several models of black hole growth over cosmic time have predicted decreasing scatter in MBH as galaxy mass increases, reflecting the influence of hierarchical mergers driving galaxies and black holes toward an average MBH/Mbulge ratio. In contrast, I find nearly constant scatter in MBH over a wide range of galaxy luminosities and bulge masses. My investigations thus far have contributed to a gradual change in astronomers' understanding of the black hole scaling relations. The present-day relations are not as tight as previously reported versions, and evidence is mounting against a universal process for co-evolution between black holes and galaxies. I will use observations of a larger sample of BCGs and massive group galaxies to explore the effects of environment on the growth of individual black holes and on cosmic scatter in MBH.
Author : International Astronomical Union. Colloquium
Publisher : Cambridge University Press
ISBN 13 : 9780521849081
Total Pages : 586 pages
Book Rating : 4.8/5 (49 download)
Download or read book Outskirts of Galaxy Clusters (IAU C195) written by International Astronomical Union. Colloquium and published by Cambridge University Press. This book was released on 2004-12-16 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the International Astronomical Union Colloquium no. 195, held in Torino, Italy in 2004. The meeting investigated the formation of galaxies within a full cosmological context, focusing on the outer regions of galaxy clusters. The observed correlation of optical and radio properties of galaxies with their environment indicates that the formation and evolution of galaxies is intimately linked to the formation of large scale structure. With chapters written by leading authorities in the field, this timely volume investigates the role of the environment in determining the properties of galaxies. It describes the distribution of matter and galaxies on the largest scales in the Universe, the processes of cluster and galaxy formation, their role and interplay. This is a valuable collection of review articles for professional astronomers.
Author : Markus Kissler-Patig
Publisher : Springer Science & Business Media
ISBN 13 : 9783540404729
Total Pages : 382 pages
Book Rating : 4.4/5 (47 download)
Download or read book Extragalactic Globular Cluster Systems written by Markus Kissler-Patig and published by Springer Science & Business Media. This book was released on 2003-07-21 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dramatic progress is a trademark of the recent study of globular cluster systems. Considerations about the formation and evolution compose the first chapter, followed by a chapter on young star clusters. Then come four chapters reviewing the globular cluster system of early-type, late-type and dwarf galaxies, as well as of groups of galaxies. One chapter is dedicated to stellar population models and their applications to the field. Finally a chapter reviews the kinematics of galaxies derived from globular cluster systems and another their role in the context of galaxy formation and evolution studies. As a whole, the book gives an up-to-date view of the field at the beginning of the new decade, which will without doubt again bring significant progress in our understanding of globular cluster systems and galaxy formation and evolution.
Author : Tom Richtler
Publisher : Springer Science & Business Media
ISBN 13 : 3540769617
Total Pages : 448 pages
Book Rating : 4.5/5 (47 download)
Download or read book Globular Clusters - Guides to Galaxies written by Tom Richtler and published by Springer Science & Business Media. This book was released on 2008-11-23 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal question of whether and how globular clusters can contribute to a better understanding of galaxy formation and evolution is perhaps the main driving force behind the overall endeavour of studying globular cluster systems. Naturally, this splits up into many individual problems. The objective of the Joint ESO-FONDAP Workshop on Globular Clusters - Guides to Galaxies was to bring together researchers, both observational and theoretical, to present and discuss the most recent results. Topics covered in these proceedings are: internal dynamics of globular clusters and interaction with host galaxies (tidal tails, evolution of cluster masses), accretion of globular clusters, detailed descriptions of nearby cluster systems, ultracompact dwarfs, formations of massive clusters in mergers and elsewhere, the ACS Virgo survey, galaxy formation and globular clusters, dynamics and kinematics of globular cluster systems and dark matter-related problems. With its wide coverage of the topic, this book constitutes a valuable reference of the scientific knowledge of the field.
Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
ISBN 13 : 9780521874687
Total Pages : 516 pages
Book Rating : 4.8/5 (746 download)
Download or read book Dynamical Evolution of Dense Stellar Systems (IAU S246) written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2008-06-12 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dense stellar systems lie at the interface between dynamics, stellar evolution, and galaxy formation, and they provide us with an ideal laboratory to understand many different aspects of these important fields as well as to explore the interplay between them. The complete study of dense stellar systems is a very challenging task which requires the collaboration and the exchange of ideas of astronomers and physicists with observational and theoretical expertise in galactic and extra-galactic astronomy, stellar dynamics, hydrodynamics, stellar evolution, as well as knowledge of many aspects of computational physics. IAU Symposium 246 brought together experts in all these areas to cover the broad field of dense stellar systems with particular emphasis on the interplay between them and on the comparison between observations and simulations. This volume provides a complete review of the most recent studies in this topical research.
Author :
Publisher :
ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.:/5 (45 download)
Download or read book Stars and Stellar Systems written by and published by . This book was released on 1965 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sidney Van den Bergh
Publisher : Cambridge University Press
ISBN 13 : 0521623359
Total Pages : 125 pages
Book Rating : 4.5/5 (216 download)
Download or read book Galaxy Morphology and Classification written by Sidney Van den Bergh and published by Cambridge University Press. This book was released on 1998-04-16 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise and up-to-date guide to the shape of galaxies and how they can be classified, by one of the pioneers of the field.
Author : Sandra M. Faber
Publisher : Springer Science & Business Media
ISBN 13 : 1461247624
Total Pages : 475 pages
Book Rating : 4.4/5 (612 download)
Download or read book Nearly Normal Galaxies written by Sandra M. Faber and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is sometimes said that astronomy is the crossroads of physics. In the same spirit, it can forcefully be argued that galaxies are the crossroads of astronomy. Internal pro ces ses within galaxies involve all of the fundamental components of astrophysics: stellar evolution, star formation, low-density astrophysics, dynamics, hydrodynamics, and high-energy astrophysics. Indeed, one can hardly name an observational datum in any wavelength range on any kind of celestial object that does not provide a useful clue to galaxy formation and evolution. Although internal processes in galaxies until recently occupied most of our attention, we now know that it is also vital to relate galaxies to their environment. How galaxies congregate in larger structures and are in turn influenced by them are crucial questions for galactic evolution. On a grander level we have also come to regard galaxies as the basic building blocks of the universe, the basic units whereby the large scale structure of the universe is apprehended and quantified. On a grander level still, we also believe strongly that galaxies are the direct descendents of early density irregularities in the Big Bang. Galaxy properties are now viewed as providing a crucial constraint on the physics of the Big Bang and a vital link between the macroscopic and microscopic structure of the universe.
Author : Lizhi Fang
Publisher : World Scientific
ISBN 13 : 9814635642
Total Pages : 346 pages
Book Rating : 4.8/5 (146 download)
Download or read book Origin, Structure And Evolution Of Galaxies - Proceedings Of The Yellow Mountain Summer School written by Lizhi Fang and published by World Scientific. This book was released on 1988-10-01 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:The Great Astronomer Guo Shoujing and Gou Shoujing Summer School on Astrophysics (Wang Shouguan)Star Formation (C F McKee, notes by Lin Jian-Yu)The Age of Globular Clusters (P Giannone)Stellar Disks in Early-Type Galaxies (P Goldreich, notes by Huang Siqin)The Luminosity Function of Galaxies (Q Chincarini)The Structure of Dark Matter in Galaxies (J Kormendy, notes by Gao Yu)Cosmic Strings and Fractals in the Distribution of Galaxies (Fang Li Zhi)and other papers Readership: Graduate students and researchers in astrophysics.
Author : Carolin Wittmann
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (118 download)
Download or read book Ultra-compact and Ultra-diffuse Stellar Systems in Nearby Galaxy Clusters written by Carolin Wittmann and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Polychronis Papaderos
Publisher : Springer Science & Business Media
ISBN 13 : 3642220185
Total Pages : 347 pages
Book Rating : 4.6/5 (422 download)
Download or read book Dwarf Galaxies: Keys to Galaxy Formation and Evolution written by Polychronis Papaderos and published by Springer Science & Business Media. This book was released on 2012-04-23 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dwarf galaxy research constitutes an extremely vibrant field of astrophysical research, with many long-standing questions still unsettled and new ones constantly arising. The intriguing diversity of the dwarf galaxy population, observed with advanced ground-based and space-borne observatories over a wide spectral window providing an unprecedented level of detail, poses new challenges for both observers and theoreticians. The aim of this symposium was to bring together these two groups to exchange ideas and new results on the many evolutionary aspects of and open issues concerning dwarf galaxies. The main topics addressed include: the birth of dwarf galaxies: theoretical concepts and observable relics across wavelengths and time, the morphological, structural and chemical evolution of dwarf galaxies, possible evolutionary connections between early-type and late-type dwarfs, the star formation history of dwarf galaxies and its dependence on intrinsic and environmental properties, the origin and implications of starburst activity in dwarf galaxies, the fate of dwarfish systems born out of tidally ejected matter in galaxy collisions.
Author : K. F. Ogorodnikov
Publisher : Elsevier
ISBN 13 : 1483137457
Total Pages : 398 pages
Book Rating : 4.4/5 (831 download)
Download or read book Dynamics of Stellar Systems written by K. F. Ogorodnikov and published by Elsevier. This book was released on 2016-10-13 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of Stellar Systems focuses on the theoretical problems in stellar dynamics. The book first offers information on stellar dynamics, including historical development, fundamentals of synthetic method, and value of stellar dynamics. The text discusses the fundamental concepts of stellar statistics. Properties of univariate distribution functions; multivariate distribution functions; and statistical properties of stars are explained. The text then describes the elementary theory of galactic rotation and irregular forces in stellar systems. The text also tackles statistical stellar dynamics of neglecting encounters. Considerations include Boltzmann equation in curvilinear coordinates; importance of using one-valued integrals of the motion; and fundamental differential equation of stellar dynamics. The book also underscores the regular orbit of stars and dynamics of centroids. The text describes the dynamics of spherical stellar and rotating stellar systems. The theory of polytropic spheres; basic equations for spherical systems; masses and rotation of galaxies; and boundaries of galaxies are discussed. The text is highly recommended for readers interested in stellar dynamics.
Author : Richard G. Kron
Publisher : Springer Science & Business Media
ISBN 13 : 9400929196
Total Pages : 346 pages
Book Rating : 4.4/5 (9 download)
Download or read book Towards Understanding Galaxies at Large Redshift written by Richard G. Kron and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This workshop was intended as an update and an extension of the workshop 011 the "Spectral Evolution of Galaxies" that was held in Erice two years ago. It concentrates 011 Ilew developments concerning galaxies seen at large look back times. This seemed also a good opportunity to look ahead to the next generation of ground- and space based instrumentation, and to consider various future strategies for collecting information concerning the edge of the observable universe. The main idea was to bring together people with specialities in modelling galaxy components (such as stars, clusters, gas, and dust) as well as whole stellar systems (stellar populations, star formation rates, chemical enrichment), and people specialized in making direct measurements of galaxies and clusters at large look back times. The confrontation of expectations and observations was planned to be the central theme of the conference, which explains the title "Towards Understanding Galaxies at Large Redshift". The first part of the workshop focussed on the physical processes that operate in galaxies, and that would likely have some observable manifestation at large redshifts. In the second part the most recent observational work was reported, and we were pleased to have the participation of most of the groups active in this field. The last part was directed towards new approaches to be made possible by the next generation of instrumentation, although in general all the contributions were indeed in this spirit of setting more ambitious goals.
