搜索结果: 1-15 共查到“宇宙线物理学 black holes”相关记录29条 . 查询时间(0.046 秒)
Can accretion disk properties observationally distinguish black holes from naked singularities?
accretion disk properties black holes naked singularities
2010/12/20
Naked singularities are hypothetical astrophysical objects, characterized by a gravitational sin-gularity without an event horizon. Penrose has proposed a conjecture, according to which there exists a...
Quantum evaporation of Callen-Giddings-Harvey-Strominger (CGHS) black holes is analyzed in the mean field approximation. The resulting semi-classical theory incorporates back reaction. Detailed analyt...
Head-on collisions of unequal mass black holes in D=5 dimensions
Head-on collisions black holes
2010/12/24
We study head-on collisions of unequal mass black hole binaries in D=5 space-time dimensions, with mass ratios between 1:1 and 1:4. Information about gravitational radiation is extracted by using the...
Acceleration of particles by black holes -- general explanation
particles black holes general explanation
2010/12/24
We give simple and general explanation to the effect of unbound acceleration of particles by black holes. It is related to the fact that the scalar product of a timelike vector of the four-velocity o...
Thermodynamic Stability of Warped AdS3 Black Holes
Thermodynamic Stability Warped AdS3 Black Holes
2010/12/24
We study the thermodynamic stability of warped black holes in three-dimensional topologically massive gravity. The spacelike stretched black hole is parametrized by its mass and angular momentum. We ...
Field theory aspects of cosmology and black holes
Field theory aspects of cosmology black holes
2010/12/24
In this thesis we study some aspects of cosmology and black holes using field theoretic techniques. In second chapter, we present Lagrangian formulation for the non-relativistic as well as relativisti...
In this paper, we classify and construct five-dimensional black holes on gravitational instantons in vacuum Einstein gravity, with RxU(1)xU(1) isometry. These black holes have spatial backgrounds whi...
This thesis investigates two main topics concerning black holes in extensions of general relativity inspired by string theory. First, the structure of the equations of motion underlying black hole so...
We study the attractor flow and near horizon geometry of two-charge small black holes in heterotic string theory. The Hessian of Sen's entropy function with respect to the moduli fields has standard ...
Can accretion disk properties observationally distinguish black holes from naked singularities?
black holes naked singularities
2010/12/27
Naked singularities are hypothetical astrophysical objects, characterized by a gravitational singularity without an event horizon. Penrose has proposed a conjecture, according to which there exists a ...
Quantum Field Theory, Black Holes and Holography
Quantum Field Theory Black Holes Holography
2010/12/24
These notes are an expanded version of lectures given at the Croatian School on Black Holes at Trpanj, June 21-25, 2010. The aim is to provide a practical introduction to quantum field theory in curv...
Two-Center Black Holes Duality-Invariants for stu Model and its lower-rank Descendants
Two-Center Black Holes Duality-Invariants stu Model
2010/12/24
We classify 2-center extremal black hole charge configurations through duality-invariant homogeneous polynomials, which are the generalization of the unique invariant quartic polynomial for single-cen...
Single-charge rotating black holes in four-dimensional gauged supergravity
Single-charge rotating black holes four-dimensional gauged supergravity
2010/12/23
We consider four-dimensional U(1)^4 gauged supergravity, and obtain asymptotically AdS_4, non-extremal, charged, rotating black holes with one non-zero U(1) charge. The thermodynamic quantities are co...
Charged fermions tunneling from accelerating and rotating black holes
Charged fermions tunneling accelerating rotating black holes
2010/12/24
We study Hawking radiation of charged fermions from accelerating and rotation black holes with electric and magnetic charges. We calculate the tunneling probabilities of incoming and outgoing fermioni...
Entropy of extremal black holes from entropy of quasiblack holes
Entropy of extremal black holes entropy quasiblack holes
2010/12/27
The entropy of extremal black holes (BHs) is obtained using a continuity argument from extremal quasiblack holes (QBHs). It is shown that there exists a smooth limiting transition in which (i) the sys...