Supermassive Black Holes In The Distant Universe
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Author | : A.J. Barger |
Publisher | : Springer Science & Business Media |
Total Pages | : 310 |
Release | : 2013-11-09 |
Genre | : Science |
ISBN | : 1402024711 |
Quasars, and the menagerie of other galaxies with "unusual nuclei", now collectively known as Active Galactic Nuclei or AGN, have, in one form or another, sparked the interest of astronomers for over 60 years. The only known mechanism that can explain the staggering amounts of energy emitted by the innermost regions of these systems is gravitational energy release by matter falling towards a supermassive black hole --- a black hole whose mass is millions to billions of times the mass of our Sun. AGN emit radiation at all wavelengths. X-rays originating at a distance of a few times the event horizon of the black hole are the emissions closest to the black hole that we can detect; thus, X-rays directly reveal the presence of active supermassive black holes. Oftentimes, however, the supermassive black holes that lie at the centers of AGN are cocooned in gas and dust that absorb the emitted low energy X-rays and the optical and ultraviolet light, hiding the black hole from view at these wavelengths. Until recently, this low-energy absorption presented a major obstacle in observational efforts to map the accretion history of the universe. In 1999 and 2000, the launches of the Chandra and XMM-Newton X-ray Observatories finally broke the impasse. The impact of these observatories on X-ray astronomy is similar to the impact that the Hubble Space Telescope had on optical astronomy. The astounding new data from these observatories have enabled astronomers to make enormous advances in their understanding of when accretion occurs.
Author | : Fulvio Melia |
Publisher | : Princeton University Press |
Total Pages | : 324 |
Release | : 2007 |
Genre | : Science |
ISBN | : 9780691131290 |
Author | : |
Publisher | : |
Total Pages | : 64 |
Release | : 2013 |
Genre | : Black holes (Astronomy) |
ISBN | : 9780716695899 |
"An introduction to quasars and black holes with information about their formation and characteristics. Includes diagrams, fun facts, a glossary, a resource list, and an index"--Provided by publisher.
Author | : Mitchell Begelman |
Publisher | : Cambridge University Press |
Total Pages | : 504 |
Release | : 2009-12-21 |
Genre | : Science |
ISBN | : 1316139468 |
Richly illustrated with the images from observatories on the ground and in space, and computer simulations, this book shows how black holes were discovered, and discusses our current understanding of their role in cosmic evolution. This second edition covers new discoveries made in the past decade, including definitive proof of a black hole at the center of the Milky Way, evidence that the expansion of the Universe is accelerating, and the new appreciation of the connection between black holes and galaxy formation. There are entirely new chapters on gamma-ray bursts and cosmic feedback. Begelman and Rees blend theoretical arguments with observational results to demonstrate how both approaches contributed to this subject. Clear illustrations and photographs reveal the strange and amazing workings of our universe. The engaging style makes this book suitable for introductory undergraduate courses, amateur astronomers, and all readers interested in astronomy and physics.
Author | : Andrew May |
Publisher | : Icon Books |
Total Pages | : 114 |
Release | : 2019-09-05 |
Genre | : Science |
ISBN | : 1785783432 |
Extraterrestrial life is a common theme in science fiction, but is it a serious prospect in the real world? Astrobiology is the emerging field of science that seeks to answer this question. The possibility of life elsewhere in the cosmos is one of the most profound subjects that human beings can ponder. Astrophysicist Andrew May gives an expert overview of our current state of knowledge, looking at how life started on Earth, the tell-tale 'signatures' it produces, and how such signatures might be detected elsewhere in the Solar System or on the many 'exoplanets' now being discovered by the Kepler and TESS missions. Along the way the book addresses key questions such as the riddle of Fermi's paradox ('Where is everybody?') and the crucial role of DNA and water – they're essential to 'life as we know it', but is the same true of alien life? And the really big question: when we eventually find extraterrestrials, will they be friendly or hostile?
Author | : Jillian Scudder |
Publisher | : |
Total Pages | : 224 |
Release | : 2021-09-28 |
Genre | : |
ISBN | : 9781785787553 |
Author | : Neil deGrasse Tyson |
Publisher | : W. W. Norton & Company |
Total Pages | : 392 |
Release | : 2007-01-16 |
Genre | : Religion |
ISBN | : 9780393062243 |
A collection of essays on the cosmos, written by an American Museum of Natural History astrophysicist, includes "Holy Wars," "Ends of the World," and "Hollywood Nights."
Author | : Steven Henry Strogatz |
Publisher | : Houghton Mifflin Harcourt |
Total Pages | : 333 |
Release | : 2012 |
Genre | : Mathematics |
ISBN | : 0547517653 |
A delightful tour of the greatest ideas of math, showing how math intersects with philosophy, science, art, business, current events, and everyday life, by an acclaimed science communicator and regular contributor to the "New York Times."
Author | : Diane Lincoln |
Publisher | : World Scientific |
Total Pages | : 133 |
Release | : 2022-02-18 |
Genre | : Juvenile Nonfiction |
ISBN | : 9811243670 |
Science Discovery Files: 10 Forgotten Stories of Incredible Scientists tells real stories of scientific discoveries that you cannot find in textbooks or popular science books. The scientists featured are a diverse group, from female Chinese chemist Tu Youyou to William Beaumont and his handicapped assistant Alexis St. Martin, who helped pioneer studies into the human digestive system. Going beyond history, readers can also learn about the science principles behind each discovery! The backmatter includes additional information and further reading for curious readers.Scientists featured:This book is a 2023 Nautilus Book Awards winner.
Author | : David Merritt |
Publisher | : Princeton University Press |
Total Pages | : 567 |
Release | : 2013-07-21 |
Genre | : Science |
ISBN | : 1400846129 |
Deep within galaxies like the Milky Way, astronomers have found a fascinating legacy of Einstein's general theory of relativity: supermassive black holes. Connected to the evolution of the galaxies that contain these black holes, galactic nuclei are the sites of uniquely energetic events, including quasars, stellar tidal disruptions, and the generation of gravitational waves. This textbook is the first comprehensive introduction to dynamical processes occurring in the vicinity of supermassive black holes in their galactic environment. Filling a critical gap, it is an authoritative resource for astrophysics and physics graduate students, and researchers focusing on galactic nuclei, the astrophysics of massive black holes, galactic dynamics, and gravitational wave detection. It is an ideal text for an advanced graduate-level course on galactic nuclei and as supplementary reading in graduate-level courses on high-energy astrophysics and galactic dynamics. David Merritt summarizes the theoretical work of the last three decades on the evolution of galactic nuclei, the formation of massive black holes, and the interaction between black holes and stars. He explores in depth such important topics as observations of galactic nuclei, dynamical models, weighing black holes, motion near supermassive black holes, evolution of nuclei due to gravitational encounters, loss cone theory, and binary supermassive black holes. Self-contained and up-to-date, the textbook includes a summary of the current literature and previously unpublished work by the author. For researchers working on active galactic nuclei, galaxy evolution, and the generation of gravitational waves, this book will be an essential resource.