搜索结果: 61-75 共查到“理学 Make A Black Hole”相关记录199条 . 查询时间(0.213 秒)
Long-term evolution of massive black hole binaries. IV. Mergers of galaxies with collisionally relaxed nuclei
large-scale structure of Universe – cosmology: theory – cosmology: observations – cosmological parameters
2011/10/12
We simulate mergers between galaxies containing collisionally-relaxed nuclei around massive black holes (MBHs). Our galaxies contain four mass groups, representative of old stellar populations; a prim...
Velocity Structure and Variability of [O III] Emission in Black Hole Host Globular Cluster RZ2109
Velocity Structure Variability Emission Globular Cluster
2011/10/12
We present a multi-facility study of the optical spectrum of the extragalactic globular cluster RZ2109, which hosts a bright black hole X-ray source. The optical spectrum of RZ2109 shows strong and ve...
Curvature perturbation spectra from waterfall transition, black hole constraints and non-Gaussianity
waterfall transition black hole constraints non-Gaussianity
2011/10/11
We carried out numerical calculations of a contribution of the waterfall field to the primordial curvature perturbation (on uniform density hypersurfaces) $\zeta$, which is produced during waterfall t...
Electromagnetic counterparts of supermassive black hole binaries resolved by pulsar timing arrays
black hole physics — gravitational waves — accretion, accretion discs— galaxies: active
2011/10/9
Pulsar timing arrays (PTAs) are expected to detect gravitational waves (GWs) from individual low-redshift (z<1.5) compact supermassive (M>10^9 Msun) black hole (SMBH) binaries with orbital periods of ...
Multimessenger astronomy with pulsar timing and X-ray observations of massive black hole binaries
Black hole physics – Accretion, accretion discs – Gravitational waves –pulsars: general – X-rays: general
2011/10/9
We demonstrate that very massive (>10^8\msun), cosmologically nearby (z<1) black hole binaries (MBHBs), which are primary targets for ongoing and upcoming pulsar timing arrays (PTAs), are particularly...
BLR Physical Conditions in Extreme Population A Quasars: a Method to Estimate Central Black Hole Mass at High Redshift
Physical Conditions Extreme Population Quasars
2011/10/10
We describe a method for determination of physical conditions in the broad line regions of a significant subsample of Seyfert-1 nuclei and quasars. Several diagnostic ratios based on intermediate (AlI...
Extending the effective-one-body Hamiltonian of black-hole binaries to include next-to-next-to-leading spin-orbit couplings
Extending Hamiltonian black-hole binaries couplings
2011/10/17
In the effective-one-body (EOB) approach the dynamics of two compact objects of masses m1 and m2 and spins S1 and S2 is mapped into the dynamics of one test particle of mass mu = m1 m2/(m1+m2) and spi...
Numerical simulations of black-hole binaries and gravitational wave emission
Numerical Relativity Black Holes Gravitational Wave Physics Astrophysics High-Energy Physics
2011/10/17
We review recent progress in numerical relativity simulations of black-hole (BH) spacetimes. Following a brief summary of the methods employed in the modeling, we summarize the key results in three ma...
Perturbed stellar motions around the rotating black hole in Sgr A* for a generic orientation of its spin axis
Classical general relativity Experimental tests of gravitational theories Black holes Physics of black holes Satellite orbits
2011/8/17
Abstract: Empirically determining the averaged variations of the orbital parameters of the stars orbiting the Supermassive Black Hole (SBH) hosted by the Galactic Centre (GC) in Sgr A* is, in principl...
The host galaxies and black-hole:galaxy mass ratios of luminous quasars at z~4
galaxies: active – galaxies: fundamental parameters – galaxies: high-redshift –galaxies: photometry – infrared: galaxies – quasars: general
2011/10/8
We present and analyse the deepest, high-quality Ks-band images ever obtained of luminous quasars at z~4, in an attempt to determine the basic properties of their host galaxies less than 1 Gyr after t...
Context. In order to study the association of the origin of ultra high energy cosmic rays (UHECR) with active galactic nuclei (AGN) at all levels of their activity we require an unbiased sample of bla...
Non-thermal Processes in Black-Hole-Jet Magnetospheres
Black Hole Magnetosphere Particle Acceleration Radiation Mechanism Gamma-Rays Cosmic Rays
2011/10/8
The environs of supermassive black holes are among the universe's most extreme phenomena. Understanding the physical processes occurring in the vicinity of black holes may provide the key to answer a ...
Primordial black hole formation and hybrid inflation
Primordial formation hybrid inflation
2011/9/29
We calculate the contribution to the curvature perturbation, that is generated while the waterfall field grows exponentially (which can occur only if the waterfall field mass is $m\gg H$). We consider...
Mergers of black-hole binaries with aligned spins: Waveform characteristics
Mergers black-hole binaries aligned spins Waveform characteristics
2011/10/18
We conduct a descriptive analysis of the multipolar structure of gravitational-radiation waveforms from equal-mass aligned-spin mergers, following an approach first presented in the complementary cont...
Violation of the first law of black hole thermodynamics in $f(T)$ gravity
Violation first law black hole thermodynamics $f(T)$ gravity
2011/10/18
We prove that the first law of black hole thermodynamics, $\delta Q=T\delta S$, is violated in $f(T)$ gravity. As a result, there always exists entropy production, which implies that the black hole th...