搜索结果: 46-60 共查到“理学 Black Holes”相关记录174条 . 查询时间(0.268 秒)
Assessing the redshift evolution of massive black holes and their hosts
quasars: general { galaxies: evolution { galaxies: formation { black hole physics
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2011/9/30
Motivated by recent observational results that focus on high redshift black holes, we explore the effect of scatter and observational biases on the ability to recover the intrinsic properties of the b...
Accretion disks around kicked black holes: Post-kick Dynamics
Accretion disks kicked black holes: Post-kick Dynamics
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2011/9/29
Numerical calculations of merging black hole binaries indicate that asymmetric emission of gravitational radiation can kick the merged black hole at up to thousands of km/s, and a number of systems ha...
Early Black Holes in Cosmological Simulations: Luminosity Functions and Clustering Behaviour
quasars: general — galaxies: active — black hole physics — methods: numerical — galaxies: haloes
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2011/9/29
We examine predictions for the quasar luminosity functions (QLF) and quasar clustering at high redshift (z > 4.75) using MassiveBlack, our new hydrodynamic cosmological simulation which includes a sel...
VHE gamma-ray Emission from Passive Supermassive Black Holes: Constraints for NGC 1399
Emission Passive Supermassive Black Holes
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2011/9/28
Very high energy (VHE; >100 GeV) gamma-rays are expected to be emitted from the vicinity of super-massive black holes (SMBH), irrespective of their activity state. In the magnetosphere of rotating SMB...
Formation of galactic nuclei with multiple supermassive black holes at high redshifts
black hole physics – galaxies:nuclei – galaxies:evolution – galaxies:high redshift – galaxies:kinematics dynamics
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2011/9/27
We examine the formation of groups of multiple supermassive black holes (SMBHs) in gas-poor galactic nuclei due to the high merger rate of galaxies at high redshifts. We calculate the relative likelih...
Hidden Symmetries for Ellipsoid-Solitonic Deformations of Kerr-Sen Black Holes and Quantum Anomalies
Hidden symmetries in general relativity gravitational anomalies nonholonomic deformations
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2011/7/25
Abstract: We prove the existence of hidden symmetries in the general relativity theory defined by exact solutions with generic off-diagonal metrics, nonholonomic (non-integrable) constraints, and defo...
A Link Between Black Holes and the Golden Ratio
black holes, constraint Hamiltonian systems, golden ratio
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2011/8/31
We consider a variational formalism to describe black holes solution in higher dimensions. Our procedure clarifies the arbitrariness of the radius parameter
and, in particular, the meaning of the eve...
Evaporation of 2-Dimensional Black Holes
Evaporation 2-Dimensional Black Holes
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2011/3/1
We present a detailed analysis of results from a new study of the quantum evaporation of Callan-Giddings-Harvey-Strominger (CGHS) black holes within the mean field approximation. This semi-classical t...
Optical black holes and solitons
Optical black holes solitons
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2011/2/24
We exhibit a static, cylindrically symmetric, exact solution to the Euler-Heisenberg eld
equations (EHFE) and prove that its e ective geometry contains (optical) black holes. It
is conjectured that...
Some Aspects of Spherical Symmetric Extremal Dyonic Black Holes in 4d N=1 Supergravity
Aspects of Spherical Symmetric Extremal Dyonic Black Holes 4d N=1 Supergravity
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2011/3/2
In this paper we study several aspects of extremal spherical symmetric black hole solutions
of for four dimensional N = 1 supergravity coupled to vector and chiral multiplets with the scalar potentia...
Decay of linear waves on higher dimensional Schwarzschild black holes
Decay of linear waves higher dimensional Schwarzschild black holes
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2011/3/4
In this paper we consider solutions to the linear wave equation on higher dimensional Schwarzschild black hole spacetimes and prove robust nondegenerate energy decay estimates that are in principle re...
Can accretion disk properties observationally distinguish black holes from naked singularities?
accretion disk properties black holes naked singularities
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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...
Surprises in the Evaporation of 2-Dimensional Black Holes
2-Dimensional Black Holes
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2010/12/27
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...
The interior structure of astronomically realistic rotating black holes 3. Charged black holesThe interior structure of astronomically realistic rotating black holes 3. Charged black holes
The interior structure black holes
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2011/1/13
This paper extends to the case of charged rotating black holes the conformally stationary, axisymmetric, separable solutions presented for uncharged rotating black holes in a companion paper. In the p...
The interior structure of astronomically realistic rotating black holes 2. Uncharged black holes
The interior structure black holes
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2011/1/13
An exact solution is obtained for the interior structure of a uncharged rotating black hole that accretes a collisionless fluid. The solutions are conformally stationary, axisymmetric, and separable. ...