Gourt > Science > Physics > Relativity > Black Holes (4)
A black hole is a concentration of mass whose gravitational field is so strong that nothing can escape. As an object moves closer to a black hole, the energy required for it to escape continues to increase until it becomes infinite at the event horizon, the surface beyond which escape is impossible. Inside the event horizon, the geometry of spacetime is distorted in a way that makes moving closer to the central singularity inevitable no matter how the infalling object moves.
The existence of black holes in the universe is well supported by astronomical observation, particularly from studying X-ray emission from X-ray binaries and active galactic nuclei.
It has been hypothesised that black holes radiate energy due to quantum mechanical effects (known as Hawking radiation).
More on [ Black hole ]
Galaxies :: Astronomy
Neutron Stars :: Stars
Astrophysics :: Physics
Rotating black branes in Brans--Dicke--Born--Infeld theory
S. H. Hendi In this paper, we present a new class of charged rotating black brane solutions in the higher dimensional BransDickeBornInfeld theory and investigate their properties. Solving the field equations directly is a nontrivial task because they include the second derivatives of the scalar field. We remove ... [J. Math. Phys. 49, 082501 (2008)] published Thu Aug 14, 2008.
About Astronomy and Space - Black Holes - Find articles, information, and web sites about these theoretical cellestial objects, formed when a massive star collapses from its own gravity.
Meta Description: [ Formed when a massive star collapses from its own gravity, black holes have such a strong pull of gravity that not even light can escape from them. Find information and pictures of black holes. Discover Black Holes and the event horizons which surround them. ]
APOD Index - Stars: Black Holes - A list of black holes pictures from NASA's Astronomy Picture of the Day archive.
Black Hole Recipe: Slow Light, Swirl Atoms - Physicists may soon create artificial analogs of black holes in the laboratory.
Meta Description: [ Whirling clouds of atoms may swallow light the way black holes do, possibly giving scientists a way to test the general theory of relativity in the lab, not just in outer space. ]
Black Holes - Observational evidence for black holes, and some developments involving cosmic censorship and the statistical origin of black hole entropy. Reviews of Modern Physics.
Black Holes and Naked Singularities - This article gives an elementary review of gravitational collapse and the cosmic censorship hypothesis. Known models of collapse resulting in the formation of black holes and naked singularities are summarized.
Black Holes: A general introduction - This article presents in a pictorial way the basic concepts of black hole's theory, as well as a description of the astronomical sites where black holes are suspected to lie.
Cambridge Relativity - Black Holes - An overview of black holes and information on current research from Cambridge.
Developments in General Relativity: Black Hole Singularity and Beyond - Presentation also addresses the questions: Can we see inside a black hole? and Can a falling observer cross the singularity without being crushed?
Do Black Holes Exist ? - Science popularization article on black holes.
Meta Description: [ Science popularization article on black holes ]
FAQ to SCI.PHYSICS on Black Holes - An FAQ list by Matt McIrvin containing basic questions and answers related to black holes.
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General Relativity and Black Holes - A set of notes on aspects of black holes.
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Geometry Around Black Holes - An exhibition on relativistic computer dynamics used to present the theory of black holes.
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Gravitational Redshift - An overview of the effects on light in the presence of a black hole.
Hawking Radiation - Classically, black holes are black. Quantum mechanically, black holes radiate, with a radiation known as Hawking radiation, after the British physicist Stephen Hawking who first proposed it.
Higher Dimensional Chern-Simons Theories and Topological Black Holes - It has been recently pointed out that black holes of constant curvature with a chronological singularity can be constructed in any spacetime dimension. In this paper, a brief summary of these new black holes is given.
Introduction to Black Hole Microscopy - The aim of these notes is both to review the standard understanding of the Hawking effect. The fundamentals of the Unruh effect are reviewed, and then the Hawking effect is explained as a ``gravitational Unruh effect
Jillian's Guide to Black Holes - An informal introduction to types, formation, and environment.
Meta Description: [ Gothos is a creative outlet for fantasy art and an educational site for black holes and gravitational waves. Diversity is nice, isn't it? ]
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Kerr's Rotating Black Holes. - A brief mathematical description of this phenomenon and diagrams of the mathematical results.
Modern Research by Eduard Westra - Research done about low mass black holes. On the level of 2nd year astronomy students.
Quantum Fields Near Black Holes - This review gives an introduction into problems, concepts and techniques when quantizing matter fields near black holes.
Quantum Geometry and Black Holes - Non-perturbative quantum general relativity provides a possible framework to analyze issues related to black hole thermodynamics from a fundamental perspective.
Schwarzschild Geometry - Describes the spacetime geometry of empty space surrounding any spherical mass.
Schwarzschild's Spacetime - A site explaining the Schwarzschild solution and how it leads to black holes.
SETI@home Listens to the Dying Gasps of Black Holes - Visit this site to find out more and get involved.
Meta Description: [ The Planetary Society, your SETI starting point. ]
Spacetime Geometry Inside a Black Hole - After introducing general relativity theory, black holes are described. The reader is assumed to know calculus and some special relativity theory.
The Net Advance of Physics: Black Holes - A set of links to numerous black holes resources on the Web. A great starting point to finding some advanced papers on the topic.
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