This is the first comprehensive treatment of active galactic nuclei--the cosmic powerhouses at the core of many distant galaxies. The term active galactic nuclei refers to quasars, radio galaxies, Seyfert galaxies, blazars, and related objects, all of which are believed to share a similar central engine--a supermassive black hole many times the mass of the Sun. Astrophysicists have studied these phenomena for the past several decades and have begun to develop a consensus about many of their properties and internal mechanisms. Julian Krolik, one of the world's leading authorities on the subject, sums up leading ideas from across the entire range of research, making this book an invaluable resource for astronomers, physicists interested in applications of the theory of gravitation, and graduate students. Krolik begins by addressing basic questions about active galactic nuclei: What are they? How can they be found? How do they evolve? He assesses the evidence for massive black holes and considers how they generate power by accretion. He discusses X-ray and g-ray emission, radio emission and jets, emission and absorption lines, anisotropic appearance, and the relationship between an active nucleus and its host galaxy. He explores the mysteries of what ignites, fuels, and extinguishes active galactic nuclei, and concludes with a general review of where the field now stands. The book is unique in paying careful attention to relevant physics as well as astronomy, reflecting in part the importance of general relativity to understanding active galactic nuclei. Clear, authoritative, and detailed, this is crucial reading for anyone interested in one of the most dynamic areas of astrophysics today.

Julian Krolik, himself a substantial contributor to high-energy astrophysics, has written an impressive book that will be welcomed by researchers in the field... It fills a notable gap in the existing literature. -- Martin Rees, Institute of Astronomy, University of Cambridge I read this book with great interest and joy. It covers the whole subject of active galactic nuclei in depth. -- Marek Abramowicz, Goteborg University, Sweden

About the Author
Julian H. Krolik is Professor of Physics and Astronomy at The Johns Hopkins University. He has written widely on theoretical astrophysics, specializing in active galactic nuclei.

Reviews
Winner of the 1999 Award for Best Professional/Scholarly Book in Physics and Astronomy, Association of American Publishers "Krolik treats almost every aspect of the AGN phenomenon, ... This global survey of AGN physics makes Krolik's book the most useful in the field for years... [A] valuable reference for anybody interested in the physics of these cosmic powerhouses."--Chris Reynolds, Nature "A broad and thorough review of the standard model for AGN, including observational information and theoretical modeling. It will provide graduate and advanced undergraduate students with an excellent introduction to the field."--Ruth A. Daly, Physics Today


Awards
Short-listed for Association of American Publishers' Annual Award in Physics and Astronomy 1999.



Book Information
ISBN 9780691011516
Author Julian H. Krolik
Format Paperback
Page Count 632
Imprint Princeton University Press
Publisher Princeton University Press
Weight(grams) 851g