The Black Hole At The Center Of Our Galaxy
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The Black Hole At The Center Of Our Galaxy
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Author : Fulvio Melia
language : en
Publisher: Princeton University Press
Release Date : 2018-06-05
The Black Hole At The Center Of Our Galaxy written by Fulvio Melia and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-05 with Science categories.
Could Einstein have possibly anticipated directly testing the most captivating prediction of general relativity, that there exist isolated pockets of spacetime shielded completely from our own? Now, almost a century after that theory emerged, one of the world's leading astrophysicists presents a wealth of recent evidence that just such an entity, with a mass of about three million suns, is indeed lurking at the center of our galaxy, the Milky Way--in the form of a supermassive ''black hole''! With this superbly illustrated, elegantly written, nontechnical account of the most enigmatic astronomical object yet observed, Fulvio Melia captures all the excitement of the growing realization that we are on the verge of actually seeing this exotic object within the next few years. Melia traces our intellectual pilgrimage to the ''brooding behemoth'' at the heart of the Milky Way. He describes the dizzying technological advances that have recently brought us to the point of seeing through all the cosmic dust to a dark spot in a clouded cluster of stars in the constellation Sagittarius. Carefully assembling the compelling circumstantial evidence for its black hole status, he shows that it is primed to reveal itself as a glorious panorama of activity within this decade--through revolutionary images of its ''event horizon'' against the bright backdrop of nearby, radiating gas. Uniquely, this book brings together a specific and fascinating astronomical subject--black holes--with a top researcher to provide both amateur and armchair astronomers, but also professional scientists seeking a concise overview of the topic, a real sense of the palpable thrill in the scientific community when an important discovery is imminent.
The Black Hole At The Center Of The Milky Way
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Author : Andreas Eckart
language : en
Publisher: Imperial College Press
Release Date : 2005
The Black Hole At The Center Of The Milky Way written by Andreas Eckart and has been published by Imperial College Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.
Reviewing the fundamental instrumental techniques and current observational results, this book unveils the mysteries of the physical processes in the central parsec of our Milky Way: the super-massive black hole embedded in a central stellar cluster as well as the gas and dust in the circumnuclear region. The observations described cover the entire electromagnetic spectrum from decimeter radio-waves to high energy X-ray and ?-rays, and a comprehensive summary of up-to-date astrophysical interpretations is given. The emphasis is put on observational techniques, image processing aspects, and a detailed presentation of the most cutting-edge work carried out in the near-infrared wavelength regime. These recent results include both the first orbits of stars around the central black hole and the multiwavelength variability of the central source.
The Galactic Supermassive Black Hole
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Author : Fulvio Melia
language : en
Publisher: Princeton University Press
Release Date : 2020-12-08
The Galactic Supermassive Black Hole written by Fulvio Melia and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-08 with Science categories.
Here, one of the world's leading astrophysicists provides the first comprehensive and logically structured overview of the many ideas and discoveries pertaining to the supermassive black hole at the galactic center known as Sagittarius A*. By far the closest galactic nucleus in the universe, Sagittarius A* alone can provide us with a realistic expectation of learning about the physics of strong gravitational fields, and the impact of such fields on the behavior of matter and radiation under severe physical conditions. Its proximity may even provide the opportunity to directly test one of general relativity's most enigmatic predictions--the existence of closed pockets of space-time hidden behind an event horizon. The plethora of research on Sagittarius A* since its discovery in 1974 has long seemed an interwoven pattern of loose threads. No one has successfully synthesized this growing body of work into a manageable, coherent book both for professional researchers and for students taking courses focusing on black holes and galactic nuclei--until now. With Fulvio Melia's The Galactic Supermassive Black Hole, readers finally have at their disposal a one-volume crucible of essential ideas, logically streamlined but with thorough references for those wishing to explore the various topics in greater depth.
Journey To The Center Of Our Galaxy
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Author : Joel Davis
language : en
Publisher:
Release Date : 1992-09
Journey To The Center Of Our Galaxy written by Joel Davis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-09 with Body, Mind & Spirit categories.
The Galactic Black Hole
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Author : H Falcke
language : en
Publisher: CRC Press
Release Date : 2002-12-16
The Galactic Black Hole written by H Falcke and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-12-16 with Science categories.
The supermassive black hole in the center of our Milky Way is the nearest such object and relatively easy to observe and study. Not surprisingly therefore, it is the best studied supermassive black hole. Many astrophysical and even general relativistic effects can be investigated in great detail. The Galactic Black Hole: Lectures on General Relativity and Astrophysics provides a systematic introduction to the physics/astrophysics and mathematics of black holes at a level suitable for graduate students, postdocs, and researchers in physics, astrophysics, astronomy, and applied mathematics. The focus is mainly on the supermassive black hole in the center of our Milky Way but the results can be easily generalized taking it as an example. Leading international experts provide first-hand accounts of the observational and theoretical aspects of this black hole. Topics range from the properties of the Schwarzschild metric and the collapse of a black hole, to quantum gravity, and from the structure of the Galaxy to accretion of matter and the emission properties of the Galactic Center black hole.
Revealing The Heart Of The Galaxy
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Author : Robert H. Sanders
language : en
Publisher: Cambridge University Press
Release Date : 2014
Revealing The Heart Of The Galaxy written by Robert H. Sanders and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Science categories.
An insider's view of how the massive black hole was discovered at the Galactic Center.
The Shadow Of Black Holes
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Author : Arne Grenzebach
language : en
Publisher: Springer
Release Date : 2016-05-07
The Shadow Of Black Holes written by Arne Grenzebach and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-07 with Science categories.
This book introduces an analytic method to describe the shadow of black holes. As an introduction, it presents a survey of the attempts to observe the shadow of galactic black holes. Based on a detailed discussion of the Plebański–Demiański class of space-times, the book derives analytical formulas for the photon regions and for the boundary curve of the shadow as seen by an observer in the domain of outer communication. It also analyzes how the shadow depends on the motion of the observer. For all cases, the photon regions and shadows are visualized for various values of the parameters. Finally, it considers how the analytical formulas can be used for calculating the horizontal and vertical angular diameters of the shadow, and estimates values for the black holes at the centers of our Galaxy near Sgr A* and of the neighboring galaxy M87.
Everything About Black Holes
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Author : Jonathan Valkanet
language : en
Publisher: CreateSpace
Release Date : 2015-08-22
Everything About Black Holes written by Jonathan Valkanet and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-22 with categories.
This book explains the most modern scientific knowledge about black holes. Everything known since 2015 is explained simply and clearly. Also included is the Infinite Universe Theory that answers so many unexplained mysteries in our universe like the cause of the big bang, the missing gravity, and the further accelerating galaxies. The last section explains a discovery of the connection between our Sun and the black hole at the center of our galaxy. This book is informative, entertaining, and easy to understand. A must read!
Growing Black Holes Accretion In A Cosmological Context
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Author : Andrea Merloni
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-04-25
Growing Black Holes Accretion In A Cosmological Context written by Andrea Merloni and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-04-25 with Science categories.
Supermassive black holes are now believed to play an important role in the evolution of the Universe. Every respectable galaxy hosts in its center a black hole that appears to regulate the growth of the galaxy itself. In this book, leading experts in the field review the most recent theoretical and observational results on the following topics: - formation and growth of the first black holes in the Universe and their role in the formation and evolution of galaxies - the physics of black-hole accretion and the production of relativistic jets - binary black-hole mergers and gravitational radiation. Theoretical work is supplemented by the most recent exciting results from space and ground based observatories. This volume is useful research and reference tool for the entire astrophysical community.
Supermassive Black Holes In The Distant Universe
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Author : A.J. Barger
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-09
Supermassive Black Holes In The Distant Universe written by A.J. Barger and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-09 with Science categories.
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.