Stellar Populations of QSO Host Galaxies
Author | : Knud Jahnke |
Publisher | : |
Total Pages | : 191 |
Release | : 2002 |
Genre | : |
ISBN | : |
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Author | : Knud Jahnke |
Publisher | : |
Total Pages | : 191 |
Release | : 2002 |
Genre | : |
ISBN | : |
Author | : Isabel Márquez |
Publisher | : Springer Science & Business Media |
Total Pages | : 388 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 1461506956 |
Advanced technologies in astronomy at various wavelengths have provided us with high resolution and high quality data on the QSO population. This meeting was aimed at understanding the morphology and nature of the host galaxies and environments of QSOs. The invited lectures as well as the contributed and poster papers highlighted the main issues of current research: the stellar and gaseous content of the underlying galaxy; the characterization of the population of companions and the nature of their interaction with the host galaxy; the connection between radio-loud QSO and radio-galaxies, and QSOs and ULIRGs; the evolution with redshift of both the host galaxy and its environment, and the main implications in theories of galaxy formation and evolution. This volume provides a valuable overview and timely update of the exciting and rapidly developing field of QSO hosts and their environments - essential reading for graduate students and researchers.
Author | : Andrew Ives Sheinis |
Publisher | : |
Total Pages | : 362 |
Release | : 2002 |
Genre | : Astronomical spectroscopy |
ISBN | : |
Author | : David L. Clements |
Publisher | : Springer Science & Business Media |
Total Pages | : 348 |
Release | : 2013-11-11 |
Genre | : Science |
ISBN | : 3540696482 |
Author | : GARY ALLEN BOWER |
Publisher | : |
Total Pages | : 344 |
Release | : 1992 |
Genre | : Galaxies |
ISBN | : |
for the other three galaxies.
Author | : Nasa Technical Reports Server (Ntrs) |
Publisher | : BiblioGov |
Total Pages | : 40 |
Release | : 2013-08 |
Genre | : |
ISBN | : 9781289291976 |
We present some results from our HST archival image study of 71 QSO host galaxies. The objects are selected to have z less than or equal to 0.46 and total absolute magnitude M(sub v) less than or equal to -23 in our adopted cosmology (H(sub 0) = 50 kilometers per second Mpc(sup-1), q(sub 0) = 0.5, lambda = 0)). The aim of this initial study is to investigate the composition of the sample with respect to host morphology and radio loudness, as well as derive the QSO host galaxy luminosity function. We have analyzed available WFPC2 images in R or I band (U in one case), using a uniform set of procedures. The host galaxies span a narrow range of luminosities and are exceptionally bright, much more so than normal galaxies, usually L greater than L*(sub v). The QSOs are almost equally divided among three subclasses: radio-loud QSOs with elliptical hosts, radio-quiet QSOs with elliptical hosts, and radio-quiet QSOs with spiral hosts. Radio-loud QSOs with spiral hosts are extremely rare. Using a weighting procedure, we derive the combined luminosity function of QSO host galaxies. We find that the luminosity function of QSO hosts differs in shape from that of normal galaxies but that they coincide at the highest luminosities. The ratio of the number of quasar hosts to the number of normal galaxies at a luminosity L*(sub v) is R = (Lv/11.48L*(sub v))(sup 2.46), where L*(sub v) corresponds to M*(sub v)= -22.35, and a QSO is defined to be an object with total nuclear plus host light M(sub v) less than or equal to -23. This ratio can be interpreted as the probability that a galaxy with luminosity L(sub V) will host a QSO at redshift z approximately equal to 0.26.
Author | : Chong-An Chang |
Publisher | : |
Total Pages | : 270 |
Release | : 1985 |
Genre | : Cosmic dust |
ISBN | : |
Author | : Luis C. Ho |
Publisher | : Cambridge University Press |
Total Pages | : 502 |
Release | : 2004-09-09 |
Genre | : Science |
ISBN | : 9780521824491 |
This book was originally published in 2004. Black holes are among the most mysterious objects in the Universe. Weighing up to several billion Suns, massive black holes have long been suspected to be the central powerhouses of energetic phenomena such as quasars. Advances in astronomy have not only provided spectacular proof of this long-standing paradigm, but have revealed the unexpected result that far from being rare, exotic beasts, they inhabit the center of virtually all large galaxies. Candidate black holes have been identified in increasingly large numbers of galaxies, both inactive and active, to the point where statistical studies are possible. Fresh work has highlighted the close connection between the formation, growth, and evolution of supermassive black holes and their host galaxies. This volume contains the invited lectures from an international symposium that was held to explore this exciting theme, and is a valuable review for professional astronomers and graduate students.
Author | : Danielle Alloin |
Publisher | : Springer |
Total Pages | : 243 |
Release | : 2006-09-07 |
Genre | : Science |
ISBN | : 354034621X |
This book contains a collection of lecture notes written by recognized experts in the field of Active Galactic Nuclei (AGN). The collection is aimed at providing both an introduction and at the same time an overview of the state-of-the-art of AGN research. This book also addresses the still not entirely understood link of an AGN with its host galaxy and also the related question of the birth and growth of massive black holes in the Universe.
Author | : Mauro D'Onofrio |
Publisher | : Springer Science & Business Media |
Total Pages | : 613 |
Release | : 2012-06-30 |
Genre | : Science |
ISBN | : 364227563X |
Formatted as a series of interviews with noted researchers in the field, this book reviews the history of quasar research and describes how advances in instrumentation and computation have aided quasar astronomy and changed our basic understanding of quasars.