The Tidal Disruption Of Stars By A Massive Black Hole At The Center Of A Galaxy Phd
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Author | : Michael Scott Fulbright |
Publisher | : |
Total Pages | : 0 |
Release | : 1995 |
Genre | : |
ISBN | : |
Download The Tidal Disruption of Stars by a Massive Black Hole at the Center of a Galaxy (PHD). Book in PDF, Epub and Kindle
Author | : Nicholas Chamberlain Stone |
Publisher | : Springer |
Total Pages | : 162 |
Release | : 2014-12-13 |
Genre | : Science |
ISBN | : 3319126768 |
Download The Tidal Disruption of Stars by Supermassive Black Holes Book in PDF, Epub and Kindle
This book provides a general introduction to the rapidly developing astrophysical frontier of stellar tidal disruption, but also details original thesis research on the subject. This work has shown that recoiling black holes can disrupt stars far outside a galactic nucleus, errors in the traditional literature have strongly overestimated the maximum luminosity of “deeply plunging” tidal disruptions, the precession of transient accretion disks can encode the spins of supermassive black holes, and much more. This work is based on but differs from the original thesis that was formally defended at Harvard, which received both the Roger Doxsey Award and the Chambliss Astronomy Achievement Student Award from the American Astronomical Society.
Author | : Peter G. Jonker |
Publisher | : Springer |
Total Pages | : 0 |
Release | : 2022-11-20 |
Genre | : Science |
ISBN | : 9789402421484 |
Download The Tidal Disruption of Stars by Massive Black Holes Book in PDF, Epub and Kindle
This volume provides an overview of the fast-developing field of tidal disruption events. For several decades, astronomers speculated that a hapless star could wander too close to a massive black hole and be torn apart by tidal forces. Yet it is only with the recent advent of wide-field transient surveys that such events have been detected. Written by a team of prominent researchers, the chapters detail the discoveries made so far in this burgeoning field of study across the entire electromagnetic spectrum, from gamma-rays through X-rays, ultra-violet, optical, infrared, and radio. In addition, they show how tidal disruption events can be used to study the properties of otherwise undetectable supermassive black holes; the populations and dynamics of stars in galactic nuclei; the physics of black hole accretion, including the potential to detect relativistic effects near a SMBH; and the physics of (radio) jet formation and evolution in a pristine environment. Finally, the book outlines important outstanding questions about TDEs. With more than 100 color images, the volume will be useful to researchers and others interested in learning more about this promising area of astrophysics. Previously published in Space Science Reviews in the Topical Collection “The Tidal Disruption of Stars by Massive Black Holes”
Author | : Linda Elisabeth Strubbe |
Publisher | : |
Total Pages | : 346 |
Release | : 2011 |
Genre | : |
ISBN | : |
Download Snacktime for Hungry Black Holes Book in PDF, Epub and Kindle
A star that wanders too close to the massive black hole (BH) in the center of a galaxy is headed for trouble: within a distance rT ̃r*(MBH/M*)1/3 (where r* and M* are the star's radius and mass, and MBH is the BH's mass), the BH's tidal gravity overcomes the binding gravity of the star, and the star is shredded into a stream of stellar debris. Studying this process of tidal disruption has the potential to give us insights into how central BHs and their surrounding stellar population grow and evolve. Motivated by new and upcoming rapid-cadence optical transient surveys, which should detect and allow study of tidal disruption events (TDEs) in unprecedented detail, I make theoretical predictions of the observable properties of these events to aid in their detection, identification, and interpretation. I find that stellar debris falling towards the BH is likely driven off again by radiation pressure at early times when the feeding rate is super-Eddington: this outflow has a large photosphere and relatively cool temperature, producing a luminous (̃1043 - few × 1044 erg s-1) transient event at optical wavelengths. I predict that new transient surveys such as the Palomar Transient Factory are likely to find tens to hundreds of these events. I further predict the spectroscopic signature of super-Eddington outflows-- broad, blueshifted absorption lines in the ultraviolet-- which should help confirm and teach us more about TDE candidates. Finding that the observable appearance of TDEs depends not only on BH mass but on pericenter radius of the star's last fateful orbit, I derive a theoretical expression for the disruption rate as a function of pericenter and apply it to the galaxy NGC 4467 using real observational data, laying the groundwork for more extensive studies in the future. Finally, I also present my work on the debris disk surrounding the star AU Mic, in which I propose an explanation for the physical processes of dust dynamics that give rise to the observed disk profile.
Author | : Andrew Todd Ulmer |
Publisher | : |
Total Pages | : 92 |
Release | : 1997 |
Genre | : |
ISBN | : |
Download The Tidal Disruption of Stars by Massive Black Holes Book in PDF, Epub and Kindle
Author | : Andreas Eckart |
Publisher | : Imperial College Press |
Total Pages | : 307 |
Release | : 2005 |
Genre | : Science |
ISBN | : 1860945678 |
Download The Black Hole at the Center of the Milky Way Book in PDF, Epub and Kindle
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.
Author | : Robert H. Sanders |
Publisher | : Cambridge University Press |
Total Pages | : 209 |
Release | : 2014 |
Genre | : Science |
ISBN | : 1107039185 |
Download Revealing the Heart of the Galaxy Book in PDF, Epub and Kindle
An insider's view of how the massive black hole was discovered at the Galactic Center.
Author | : Fulvio Melia |
Publisher | : Princeton University Press |
Total Pages | : |
Release | : 2020-12-08 |
Genre | : Science |
ISBN | : 0691222541 |
Download The Galactic Supermassive Black Hole Book in PDF, Epub and Kindle
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.
Author | : Fulvio Melia |
Publisher | : Princeton University Press |
Total Pages | : 202 |
Release | : 2018-06-05 |
Genre | : Science |
ISBN | : 0691186367 |
Download The Black Hole at the Center of Our Galaxy Book in PDF, Epub and Kindle
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.
Author | : Fulvio Melia |
Publisher | : Cambridge University Press |
Total Pages | : 208 |
Release | : 2003-09-04 |
Genre | : Science |
ISBN | : 9780521814058 |
Download The Edge of Infinity Book in PDF, Epub and Kindle
In the past, they were recognized as the most destructive force in nature. Now, following a cascade of astonishing discoveries, supermassive black holes have undergone a dramatic shift in paradigm. Astronomers are finding out that these objects may have been critical to the formation of structure in the early universe, spawning bursts of star formation, planets, and even life itself. They may have contributed as much as half of all the radiation produced after the Big Bang, and as many as 200 million of them may now be lurking through the vast expanses of the observable cosmos. In this elegant, non-technical account, Melia conveys for the general reader the excitement generated by the quest to expose what these giant distortions in the fabric of space and time have to say about our origin and ultimate destiny.