The Galactic Black Hole
DOWNLOAD
Download The Galactic Black Hole PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get The Galactic Black Hole book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
The Galactic Supermassive Black Hole
DOWNLOAD
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.
The Galactic Black Hole
DOWNLOAD
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.
The Black Hole At The Center Of Our Galaxy
DOWNLOAD
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.
Supermassive Black Holes In The Distant Universe
DOWNLOAD
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.
Revealing The Heart Of The Galaxy
DOWNLOAD
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.
Formation And Evolution Of Black Holes In The Galaxy
DOWNLOAD
Author : Gerald Edward Brown
language : en
Publisher: World Scientific
Release Date : 2003
Formation And Evolution Of Black Holes In The Galaxy written by Gerald Edward Brown and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Science categories.
In published papers H A Bethe and G E Brown worked out the collapse of large stars and supernova explosions. They went on to evolve binaries of compact stars, finding that in the standard scenario the first formed neutron star always went into a black hole in common envelope evolution. C-H Lee joined them in the study of black hole binaries and gamma ray bursts. They found the black holes to be the fossils of the gamma ray bursts. From their properties they could reconstruct features of the burst and of the accompanying hypernova explosions. This invaluable book contains 23 papers on astrophysics, chiefly on compact objects, written over 23 years. The papers are accompanied by illuminating commentary. In addition there is an appendix on kaon condensation which the editors believe to be relevant to the equation of state in neutron stars, and to explain why black holes are formed at relatively low masses.
The Black Hole At The Center Of The Milky Way
DOWNLOAD
Author : Andreas Eckart
language : en
Publisher: World Scientific
Release Date : 2005-09-14
The Black Hole At The Center Of The Milky Way written by Andreas Eckart and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-09-14 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 γ-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. Contents:Observational Techniques:The GC Across the Electromagnetic SpectrumNIR Imaging Through the AtmosphereSpeckle ImagingSingle Telescope Adaptive OpticsCleaning and DeconvolutionFuture IR InterferometryObservational Results:The Discovery of Sagittarius A∗Large-Scale Structures at the Galactic CenterThe Circum Nuclear DiskThe Mini-SpiralRadio FilamentsNear-Infrared Images of the Central Stellar ClusterThe Radio and Infrared Positional Reference FramesNumber Density CountsPolarization of Filaments and StarsStellar Velocities and Orbital AccelerationsSpectroscopyStar Formation at the Galactic Center?Sgr A∗ Across the Electromagnetic SpectrumAstrophysical Results:The Stellar Velocity FieldScenarios for Star Formation at the Galactic CenterThe Central Dark MassStability of the Enclosed Dark MassAgglomerations of Exotic Particles?The Central Stellar CuspAnalysis of Stellar Orbits Near the Central Black HoleThe Central Black HoleComparison to Nuclei of Other GalaxiesMassive Black Holes at High Redshifts Readership: Graduate and post-graduate students, researchers, astronomers, and astrophysicists. Key Features:Suitable basis for a single semester course at the advanced undergraduate or graduate levelCompact summary of observational results and astrophysical interpretationA bibliography comprising over 400 publications up to the editorial deadline in July 2004Keywords:Galactic Center;Imaging;Wavelengths;Stellar;Astrophysics
Active Galactic Nuclei
DOWNLOAD
Author : Julian H. Krolik
language : en
Publisher: Princeton University Press
Release Date : 2021-03-09
Active Galactic Nuclei written by Julian H. Krolik 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 2021-03-09 with Science categories.
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.
Black Hole Astrophysics
DOWNLOAD
Author : David L. Meier
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-07-27
Black Hole Astrophysics written by David L. Meier 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 2012-07-27 with Science categories.
As a result of significant research over the past 20 years, black holes are now linked to some of the most spectacular and exciting phenomena in the Universe, ranging in size from those that have the same mass as stars to the super-massive objects that lie at the heart of most galaxies, including our own Milky Way. This book first introduces the properties of simple isolated holes, then adds in complications like rotation, accretion, radiation, and magnetic fields, finally arriving at a basic understanding of how these immense engines work. Black Hole Astrophysics • reviews our current knowledge of cosmic black holes and how they generate the most powerful observed pheonomena in the Universe; • highlights the latest, most up-to-date theories and discoveries in this very active area of astrophysical research; • demonstrates why we believe that black holes are responsible for important phenomena such as quasars, microquasars and gammaray bursts; • explains to the reader the nature of the violent and spectacular outfl ows (winds and jets) generated by black hole accretion.
The Shadow Of Black Holes
DOWNLOAD
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.