New Developments in Black Hole Research

In these scenarios, black holes could be created by particle collisions with centre-of-mass energy exceeding this scale. These could be observed in particle colliders and cosmic ray detectors. Due to their high centre-of-mass energy, ...

Author: Paul V. Kreitler

Publisher: Nova Publishers

ISBN: 9781594546419

Category: Science

Page: 206

View: 994

A black hole is a point of extreme mass in space-time with a radius, or event horizon, inside of which all electromagnetic radiation (including light) is trapped by gravity. A black hole is an extremely compact object, collapsed by gravity which has overcome electric and nuclear forces. It is believed that stars appreciably larger than the Sun, once they have exhausted all their nuclear fuel, collapse to form black holes: they are "black" because no light escapes their intense gravity. Material attracted to a black hole, though, gains enormous energy and can radiate part of it before being swallowed up. Some astronomers believe that enormously massive black holes exist in the centre of our galaxy and of other galaxies. This book brings together leading research from throughout the world.

Black Hole Astrophysics

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.

Author: David L. Meier

Publisher: Springer Science & Business Media

ISBN: 3642019366

Category: Science

Page: 927

View: 622

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.

Black Hole Gravitohydromagnetics

Based on this, the first evidence for black holes was a direct consequence of the maximum mass allowable for neutron stars (values ∼2–3M ⊙ are typically es- timated). Beyond this maximum mass, a stellar remnant cannot be supported by ...

Author: Brian Punsly

Publisher: Springer Science & Business Media

ISBN: 3540769579

Category: Science

Page: 399

View: 383

Black hole gravitohydromagnetics (GHM) is developed from the rudiments to the frontiers of research in this book. GHM describes plasma interactions that combine the effects of gravity and a strong magnetic field, in the vicinity (ergosphere) of a rapidly rotating black hole. This topic was created in response to the astrophysical quest to understand the central engines of radio loud extragalactic radio sources. The theory describes a "torsional tug of war" between rotating ergospheric plasma and the distant asymptotic plasma that extracts the rotational inertia of the black hole. The recoil from the struggle between electromagnetic and gravitational forces near the event horizon is manifested as a powerful pair of magnetized particle beams (jets) that are ejected at nearly the speed of light. This second edition of the book is updated throughout and contains a completely new chapter discussing state of the art and results of numerical simulations of ergospheric disk jets occurring in magnetohydrodynamic accretion flows.

Black Hole Evaporation in Semi classical Approach

The black hole is a peculiar phenomenon in general relativity. In the problem of the black hole there is singularity problem and information loss paradox. The singularity problem means the breakdown of classical general relativity so ...

Author: Shintaro Sawayama

Publisher: Shintaro Sawayama

ISBN: 4907170033



View: 336

We consider how the mass of the black hole decreases by the Hawking radiation in the Vaidya spacetime, using the concept of dynamical horizon equation, proposed by Ashtekar and Krishnan. Using the formula for the change of the dynamical horizon, we derive an equation for the mass incorporating the Hawking radiation. It is shown that the final state is the Minkowski spacetime in our particular model. We finally solved the equation which describes how black hole mass decreases. The back-reaction problem of the Hawking radiation has not been solved by the conventional method by solving the Einstein equation. While we can solve this problem using the following three ideas. First idea is to use the dynamical horizon equation which only needs information of the horizon surface. Then we calculate usual field equation as the integration equation. Second we taken negative energy into account near the black hole horizon. Using the negative energy we can enlarge the dynamical horizon to the timelike case. Third, we use the Vaidya metric. Usually the Einstein equation and the dynamical horizon equation are not compatible. However, using the Vaidya metric as a background we can use the dynamical horizon equation in place of the Einstein equation.

Black Hole Survival Guide

In the context of quantum mechanics, black holes present a genuine physical dilemma. The very existence of the event horizon, a purely gravitational phenomenon, ensures that the Hawking radiation that emerges from the vacuum near the ...

Author: Janna Levin

Publisher: Random House

ISBN: 147357465X

Category: Science

Page: 160

View: 797

What would happen if you fell into a black hole? Black holes are the most extraordinary phenomenon in the universe, but they are a riddle that confounds our intuitions. Anything that enters them can never escape, and yet they contain nothing at all. They are bigger on the inside than the outside suggests. They are dark on the outside but not on the inside. They invert time into space and space into time. Black holes are found throughout the universe. They can be microscopic. They can be billions of times larger than our sun. Our solar system is currently orbiting a black hole 26,000 light years away at a speed of 200 km per second. In Black Hole Survival Guide physicist and novelist Janna Levin takes you on a journey into a black hole, explaining what would happen to you in there and why. In the process you'll come to see how their mysteries contain answers to some of the most profound questions ever asked about the nature of our universe.

Black Hole Astrophysics 2002

DYNAMICS OF BLACK HOLE CLUSTERS WITH ROTATION Hyung Mok Lee Astronomy Program, SEES Seoul National University, Seoul 151-742, Korea The rapid evolution of high mass stars can form black holes in a short time scale (< 107 years).

Author: Hyun Kyu Lee

Publisher: World Scientific

ISBN: 9812776761

Category: Science

Page: 376

View: 849

This book consists of about 20 lectures on theoretical and observational aspects of astrophysical black holes, by experts in the field. The basic principles and astrophysical applications of the black hole magnetosphere and the BlandfordOCoZnajek process are reviewed in detail, as well as accretion by black holes, black hole X-Ray binaries, black holes with cosmic strings, and so on. Recent advances in X-Ray observations of galactic black holes and new understanding of supermassive black holes in AGNs and normal galaxies are also discussed."

Black Hole Chasers

Black Hole Hunting in Arizona.” Black Hole Cam. May 8, 2017. Sample, Ian. “Neutrino That Struck Antarctica Traced to Galaxy 3.7bn Light Years ...

Author: Anna Crowley Redding

Publisher: Feiwel & Friends

ISBN: 1250622336

Category: Juvenile Nonfiction

Page: 192

View: 555

In Black Hole Chasers, award-winning investigative journalist Anna Crowley Redding presents the riveting true story of one of the most inspiring scientific breakthroughs of our lifetime—the Event Horizon Telescope team's reveal of the first image of a super massive black hole. In April 2019, the Event Horizon Telescope Team unveiled the first ever image of a super massive black hole. This inspiring scientific breakthrough took years of hard work, innovative thinking, and a level of global cooperation never seen before. The challenge was immense. The goal was impossible. They would need a telescope as big as the earth itself. The technology simply didn’t exist. And yet, a multi-national team of scientists was able to show the world an image of something previously unseeable. Based off extensive research and hours interviews with many of the team's ground-breaking scientist, physicists, and mathematicians, Black Hole Chasers is a story of unique technological innovation and scientific breakthroughs, but more importantly, it's a story of human curiosity and triumph.

Introduction to Black Hole Astrophysics

The main goal for the near future is to prove that the objects we identify as black hole have indeed the properties predicted by the relativistic theory of gravitation, the key feature being the event horizon.

Author: Gustavo E. Romero

Publisher: Springer

ISBN: 3642395961

Category: Science

Page: 318

View: 955

This book is based on the lecture notes of a one-semester course on black hole astrophysics given by the author and is aimed at advanced undergraduate and graduate students with an interest in astrophysics. The material included goes beyond that found in classic textbooks and presents details on astrophysical manifestations of black holes. In particular, jet physics and detailed accounts of objects like microquasars, active galactic nuclei, gamma-ray bursts, and ultra-luminous X-ray sources are covered, as well as advanced topics like black holes in alternative theories of gravity. The author avoids unnecessary technicalities and to some degree the book is self-contained. The reader will find some basic general relativity tools in Chapter 1. The appendices provide some additional mathematical details that will be useful for further study, and a guide to the bibliography on the subject.

The Black Hole War

claimed, was to erase information, even if there was no “real” black hole in the vicinity. In chapter 7, you will learn exactly what “information” means and also what it means to lose it. For now, just take it from me: this was an ...

Author: Leonard Susskind

Publisher: Hachette UK

ISBN: 0316032697

Category: Science

Page: 480

View: 158

What happens when something is sucked into a black hole? Does it disappear? Three decades ago, a young physicist named Stephen Hawking claimed it did, and in doing so put at risk everything we know about physics and the fundamental laws of the universe. Most scientists didn't recognize the import of Hawking's claims, but Leonard Susskind and Gerard t'Hooft realized the threat, and responded with a counterattack that changed the course of physics. The Black Hole War is the thrilling story of their united effort to reconcile Hawking's revolutionary theories of black holes with their own sense of reality -- effort that would eventually result in Hawking admitting he was wrong, paying up, and Susskind and t'Hooft realizing that our world is a hologram projected from the outer boundaries of space. A brilliant book about modern physics, quantum mechanics, the fate of stars and the deep mysteries of black holes, Leonard Susskind's account of the Black Hole War is mind-bending and exhilarating reading.

A Black Hole Is Not a Hole

How Did We Find Out About Black Holes? New York: Walker and Company, 1978. This oldy is still a goody. Isaac Asimov writes in clear detail about key discoveries related to black holes. Burnham, Robert. The Reader's Digest Children's ...

Author: Carolyn Cinami DeCristofano

Publisher: Charlesbridge Publishing

ISBN: 1632896478

Category: Juvenile Nonfiction

Page: 80

View: 727

Budding astronomers and scientists will love this humorous introduction to the extremely complex concept of black holes. With space facts and answers about the galaxies (ours, and others) A Black Hole is NOT a Hole takes readers on a ride that will stretch their minds around the phenomenon known as a black hole. In lively and text, the book starts off with a thorough explanation of gravity and the role it plays in the formation of black holes. Paintings by Michael Carroll, coupled with real telescopic images, help readers visualize the facts and ideas presented in the text, such as how light bends, and what a supernova looks like. Back matter includes a timeline which sums up important findings discussed throughout, while the glossary and index provide a quick point of reference for readers. Children and adults alike will learn a ton of spacey facts in this far-out book that’s sure to excite even the youngest of astrophiles.

The Black Hole in Isaiah

Returning to Isaiah, the gap between Isa 39 and 40 can be compared to a black hole. Just as space and time most probably collapse inside a black hole, the narrative structure of this prophetic book collapses in the anti-climax at its ...

Author: Frederik Poulsen

Publisher: Mohr Siebeck

ISBN: 3161568621

Category: Religion

Page: 489

View: 900

La 4e de couverture indique : "Isaiah is strangely silent on the destruction of Jerusalem and the people's deportation to Babylon in the early sixth century BCE. Frederik Poulsen demonstrates that the exile hides itself as a "black hole" at the center of the composition and thereby has a decisive influence on the literary structure, poetic imagery, and theological message of this prophetic book"

Black Hole Drive

Both hadan engine calleda blackhole drive. This drive usedthe partial wormhole to createablack hole's type of gravity well. That blackhole level of gravity pulled the ship forward, riding the partial wormhole.

Author: W. Strawn Douglas

Publisher: Author House

ISBN: 1468509764

Category: Fiction

Page: 212

View: 138

Captain Hardesty and Commander Bowman must shelve their romance long enough to rescue a mining colony and their sentient spaceship, known as Candide, from the threats of a corrupt policeman and a few opportunistic thieves. Bowman shines as she deduces the fate of Candide and all inside of him pivot on a sixty year old fulcrum that calls out to a rebels rebel, a player left offstage for six decades. Bowman has the choice of survival and success or the end of her command. She chooses survival. All the while opening a new tomorrow to the newest addition to her manifest, the miner girl Piglet whose youth and vigor threaten Candide with happiness and new adventures. Black Hole Drive is a tome on hope and spins a tale of true satisfaction for those in its world. Piglet is thus launched into intrigues and art with few to guide her but the crew she has just met and the mining colony that has been her home for nearly two decades.

The Black Hole at the Center of Our Galaxy

Without a partner to annihilate , the detached particle flees the black hole's sphere of influence and merges into the flux of escaping radiation headed for infinity . To us , this looks like the black hole is actually radiating ...

Author: Fulvio Melia

Publisher: Princeton University Press

ISBN: 9780691095059

Category: Science

Page: 189

View: 577

A noted professor of physics and astronomy recalls the intellectual journey to understand the galaxy, and universe that contains it, in the twentieth century, looking at the unique features of the Milky Way, the technological advances that have allowed us to research it, and describing a black hole that exists at the very center of our galaxy. (Science & Mathematics)

The Black Hole Bandits

Kronkold Probablywillget and discussing 0P-TK on working! which their planet black hole sucked first. into TJ Uh-oh, going the are bird being I to hope guy.get careful caught! Dani They're and with And there's looks so Mr. worried.

Author: Steve Foxe

Publisher: Stone Arch Books

ISBN: 1496594576

Category: Juvenile Fiction

Page: 64

View: 216

Mr. Kazarian has a problem...his evil cousin, Kronkhold, is threatening to consume the galaxy with his new device, a black-hole generator. Mr. K's four favorite students are in the library researching Albert Einstein when they see Mr. K heading out on his mission to stop Kronkhold. What better way to learn about black holes and Einstein's theories than to ride along? Oh, and hopefully help save their home in the Milky Way. Bravely facing Kronkhold and his space-pirate flunkies, Mr. K and the students get a little too up close and personal with a black hole and must outwit the evil scientist to save the galaxy and themselves! Science fiction packed full of space facts!

The Black Hole as a Vital Organ of the Universe

holes can blend the foreign mass with a large number of behaviors. Figure 4.13. 4.3.2. Case. 2: In this case, any foreign mass that passes through the black hole have its DNA turn to 11111111 DNA. Let's assume the moment the DNA of the ...

Author: Ajmal Beg

Publisher: Ajmal Beg

ISBN: 0980561019

Category: Body, Mind & Spirit


View: 252

Cosmological and Black Hole Apparent Horizons

This book overviews the extensive literature on apparent cosmological and black hole horizons.

Author: Valerio Faraoni

Publisher: Springer

ISBN: 331919240X

Category: Science

Page: 199

View: 652

This book overviews the extensive literature on apparent cosmological and black hole horizons. In theoretical gravity, dynamical situations such as gravitational collapse, black hole evaporation, and black holes interacting with non-trivial environments, as well as the attempts to model gravitational waves occurring in highly dynamical astrophysical processes, require that the concept of event horizon be generalized. Inequivalent notions of horizon abound in the technical literature and are discussed in this manuscript. The book begins with a quick review of basic material in the first one and a half chapters, establishing a unified notation. Chapter 2 reminds the reader of the basic tools used in the analysis of horizons and reviews the various definitions of horizons appearing in the literature. Cosmological horizons are the playground in which one should take baby steps in understanding horizon physics. Chapter 3 analyzes cosmological horizons, their proposed thermodynamics, and several coordinate systems. The remaining chapters discuss analytical solutions of the field equations of General Relativity, scalar-tensor, and f(R) gravity which exhibit time-varying apparent horizons and horizons which appear and/or disappear in pairs. An extensive bibliography enriches the volume. The intended audience is master and PhD level students and researchers in theoretical physics with knowledge of standard gravity.

The Neutron Star Black Hole Connection

... black holes , we pointed out that the expected coronal X - ray emission from the tidally locked and rapidly rotating stellar companions is at a level consistent with that observed from the black hole transients A 0620-00 and GRO ...

Author: Chryssa Kouveliotou

Publisher: Springer Science & Business Media

ISBN: 9781402002052

Category: Science

Page: 522

View: 929

The foremost observers and theorists discuss the latest developments in the astrophysics of neutron stars, black holes and their interaction in the universe. Often found in compact, interacting binaries, these objects exhibit broadly similar behaviour. The determination of observational signatures that distinguish between these two types of objects is systematically explored. Supernovae and evolutionary scenarios leading to neutron stars and black holes, single or in binaries, are also discussed in detail. There is also a discussion of the decades old mystery of cosmic gamma ray bursts, currently thought to represent enormous stellar explosions at cosmological distances. These could be the result of mergers of a neutron star and its compact binary companion: a literal neutron star-black hole connection. A lucid series of lectures for the advanced graduate student. A unifying text that will appeal to the research astrophysicist and space physicist.

Black Hole Blues and Other Songs from Outer Space

Striving to make the ambition a reality, the original three gradually accumulated an international team of hundreds. As this book was written, two massive instruments of remarkably delicate sensitivity were brought to advanced capability.

Author: Janna Levin

Publisher: Anchor

ISBN: 0307958205

Category: Science

Page: 256

View: 492

The authoritative story of the headline-making discovery of gravitational waves—by an eminent theoretical astrophysicist and award-winning writer. From the author of How the Universe Got Its Spots and A Madman Dreams of Turing Machines, the epic story of the scientific campaign to record the soundtrack of our universe. Black holes are dark. That is their essence. When black holes collide, they will do so unilluminated. Yet the black hole collision is an event more powerful than any since the origin of the universe. The profusion of energy will emanate as waves in the shape of spacetime: gravitational waves. No telescope will ever record the event; instead, the only evidence would be the sound of spacetime ringing. In 1916, Einstein predicted the existence of gravitational waves, his top priority after he proposed his theory of curved spacetime. One century later, we are recording the first sounds from space, the soundtrack to accompany astronomy’s silent movie. In Black Hole Blues and Other Songs from Outer Space, Janna Levin recounts the fascinating story of the obsessions, the aspirations, and the trials of the scientists who embarked on an arduous, fifty-year endeavor to capture these elusive waves. An experimental ambition that began as an amusing thought experiment, a mad idea, became the object of fixation for the original architects—Rai Weiss, Kip Thorne, and Ron Drever. Striving to make the ambition a reality, the original three gradually accumulated an international team of hundreds. As this book was written, two massive instruments of remarkably delicate sensitivity were brought to advanced capability. As the book draws to a close, five decades after the experimental ambition began, the team races to intercept a wisp of a sound with two colossal machines, hoping to succeed in time for the centenary of Einstein’s most radical idea. Janna Levin’s absorbing account of the surprises, disappointments, achievements, and risks in this unfolding story offers a portrait of modern science that is unlike anything we’ve seen before.

Death by Black Hole And Other Cosmic Quandaries

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: Neil deGrasse Tyson

Publisher: W. W. Norton & Company

ISBN: 0393330168

Category: Science

Page: 384

View: 921

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."