搜索结果: 1-15 共查到“知识库 理学 black hole”相关记录175条 . 查询时间(0.103 秒)
Ultraluminous X-ray source 1E 0953.8+6918 (M81 X-9): an intermediate-mass black hole candidate and its environs
binaries bubbles
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2014/12/26
We present a ROSAT and ASCA study of the Einstein source X-9 and its relation to a shock-heated shell-like optical nebula in a tidal arm of the M81 group of interacting galaxies. Our ASCA observation ...
XMM-Newton Spectra of Intermediate-Mass Black Hole Candidates: Application of a Monte Carlo Simulated Model
NGC 5408 NGC 628
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2014/12/24
We present a systematic spectral analysis of six ultraluminous X-ray sources (NGC 1313 X-1 and X-2, IC 342 X-1, Ho IX X-1, NGC 5408 X-1, and NGC 3628 X-1) observed with the XMM-Newton observatory. The...
Black hole X-ray binaries LMC X–1 and X–3: observations confront spectral models
LMC X–1 LMC X–3
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2014/12/24
We present a comprehensive spectral analysis of black hole X-ray binaries, LMC X–1 and X–3, based on BeppoSAX observations. We test both the multicolour disc plus power-law (MCD+PL) model and a newly ...
Cosmological multi-black-hole solutions
Einstein Maxwell equation the charged black holes time and space actively the cosmological constant a black hole
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2014/12/23
We present simple, analytic solutions to the Einstein-Maxwell equation, which describe an arbitrary number of charged black holes in a spacetime with a positive cosmological constant Λ. In the limit Λ...
Testing cosmic censorship with black hole collisions
Quality of the hole the cosmological constant total quality extreme limit
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2014/12/23
There exists an upper limit on the mass of black holes when the cosmological constant Λ is positive. We study the collision of two black holes whose total mass exceeds this limit. Our investigation is...
U duality, D-branes, and black hole emission rates: Agreements and disagreements
Absorption coefficient five dimensions scalar field a black hole the parameter space
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2014/12/22
An expression for the spacetime absorption coefficient of a scalar field in a five-dimensional, near-extremal black hole background is derived, which has the same form as that presented by Maldacena a...
VARIABLE O VI AND N V EMISSION FROM THE X-RAY BINARY LMC X-3: HEATING OF THE BLACK HOLE COMPANION*
Cosmic Origins
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2014/12/22
Based on high-resolution ultraviolet spectroscopy obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Cosmic Origins Spectrograph, we present new detections of O VI and N V emissio...
THE MURMUR OF THE HIDDEN MONSTER: CHANDRA'S DECADAL VIEW OF THE SUPERMASSIVE BLACK HOLE IN M31
X-ray source flaring emission
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2014/12/20
The Andromeda galaxy (M31) hosts a central supermassive black hole (SMBH), known as M31*, which is remarkable for its mass (~108 M ) and extreme radiative quiescence. Over the past decade, the Chandra...
The thermodynamics of Kaluza–Klein black hole/bubble chains
Bubble surface black holes time and space exchange said sex black hole static
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2014/12/19
A Killing bubble is a minimal surface that arises as the fixed surface of a spacelike Killing field. We compute the bubble contributions to the Smarr relations and the mass and tension first laws for ...
Solutions of the dilaton field equations with applications to the soliton-black hole correspondence in generalised JT gravity
Soliton A black hole A two-dimensional gravity
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2014/12/9
In this thesis, we explore connections between solitons, black holes, and harmonic maps in two-dimensional gravitation. Euclidean sine-Gordon theory, naturally admitting soliton solutions, and Schwarz...
Searches For Gravitational Waves From Binary Black Hole Coalescences With Ground-based Laser Interferometers Across a Wide Parameter Space
Binary Black Hole Data Analysis Gravitational-Waves LIGO NINJA Signal Processing
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2014/11/20
This is an exciting time for Gravitational Wave (GW) theory and observations. From a theoretical standpoint, the grand-challenge problem of the full evolution of a Binary Black Hole (BBH) system has b...
Is it possible to create a quantum electromagnetic "black hole" at the Large Hadron Collider?
quantum electromagnetic "black hole" Large Hadron Collider Optics
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2012/4/19
As demonstrated by Chernodub, strong magnetic field forces vacuum to develop real condensates of electrically charged rho mesons, which form an anisotropic inhomogeneous superconducting state similar ...
Effect of a Weak Electromagnetic Field on Particle Acceleration by a Rotating Black Hole
Weak Electromagnetic Field Particle Acceleration Rotating Black Hole
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2012/2/23
We study high energy charged particle collisions near the horizon in an electromagnetic field around a rotating black hole and reveal the condition of the fine-tuning to obtain arbitrarily large cente...
Modelling supermassive black hole growth: towards an improved sub-grid prescription
Modelling supermassive black hole growth sub-grid prescription
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2012/2/24
Accretion onto supermassive black holes (SMBHs) in galaxy formation simulations is frequently modelled by the Bondi-Hoyle formalism. Here we examine the validity of this approach analytically and nume...
A double component in GRB 090618: a proto-black hole and a genuinely long GRB
double component GRB 090618 proto-black hole GRB
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2012/2/23
The joint X and gamma-ray observations of GRB 090618 by a large number of satellites offer an unprecedented possibility of testing crucial aspects of theoretical models. In particular, it allows us to...