Supermassive Black Holes in the Distant Universe

Supermassive Black Holes in the Distant Universe PDF Author: A.J. Barger
Publisher: Springer Science & Business Media
ISBN: 1402024711
Category : Science
Languages : en
Pages : 310

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Book Description
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.

Supermassive Black Holes in the Distant Universe

Supermassive Black Holes in the Distant Universe PDF Author: A.J. Barger
Publisher: Springer Science & Business Media
ISBN: 1402024711
Category : Science
Languages : en
Pages : 310

Get Book Here

Book Description
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.

The Galactic Supermassive Black Hole

The Galactic Supermassive Black Hole PDF Author: Fulvio Melia
Publisher: Princeton University Press
ISBN: 9780691131290
Category : Science
Languages : en
Pages : 324

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Book Description
Publisher description

Quasars and Black Holes

Quasars and Black Holes PDF Author:
Publisher:
ISBN: 9780716695899
Category : Black holes (Astronomy)
Languages : en
Pages : 64

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Book Description
"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.

Gravity's Fatal Attraction

Gravity's Fatal Attraction PDF Author: Mitchell Begelman
Publisher: Cambridge University Press
ISBN: 1316139468
Category : Science
Languages : en
Pages : 504

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Book Description
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.

Astrobiology

Astrobiology PDF Author: Andrew May
Publisher: Icon Books
ISBN: 1785783432
Category : Science
Languages : en
Pages : 114

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Book Description
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?

Astroquizzical - the Illustrated Edition

Astroquizzical - the Illustrated Edition PDF Author: Jillian Scudder
Publisher:
ISBN: 9781785787553
Category :
Languages : en
Pages : 224

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Book Description


Science Discovery Files: 10 Forgotten Stories Of Incredible Scientists

Science Discovery Files: 10 Forgotten Stories Of Incredible Scientists PDF Author: Diane Lincoln
Publisher: World Scientific
ISBN: 9811243670
Category : Juvenile Nonfiction
Languages : en
Pages : 133

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Book Description
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.

Death By Black Hole

Death By Black Hole PDF Author: Neil deGrasse Tyson
Publisher: W. W. Norton & Company
ISBN: 9780393062243
Category : Religion
Languages : en
Pages : 392

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Book Description
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."

The Joy of X

The Joy of X PDF Author: Steven Henry Strogatz
Publisher: Houghton Mifflin Harcourt
ISBN: 0547517653
Category : Mathematics
Languages : en
Pages : 333

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Book Description
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."

Treknology

Treknology PDF Author: Ethan Siegel
Publisher: Voyageur Press
ISBN: 0760361754
Category : Science
Languages : en
Pages : 219

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Book Description
Be amazed by 25 iconic pieces of tech from the Star Trek canon and the science behind how they function with Treknology. You will not believe how close we are to achieving some of them today. The name Star Trek conjures images of faster-than-light spacecraft, holographic crew members, and phasers set to stun. Some of these incredible devices may still be far from our reach, but others have made the leap from science fiction to science fact—and now you can learn the science and engineering of what makes them tick. Treknology looks at over twenty-five iconic inventions from the complete history of the Star Trek television and film universe. Author Ethan Siegel explores and profiles these dazzling technologies and their role Star Trek, the science behind how they work, and how close we are to achieving them in the real world today. This stunning collection is packed with 150 superbfilm and television stills, prop photography, and scientific diagrams to pull you into another world. Brace yourself for a detailed look at the inner workings of Star Trek’s computing capabilities, communications equipment, medical devices, and awe-inspiring ships. Treknology is one that no fan of Star Trek, or future tech, will want to miss.