搜索结果: 1-15 共查到“高能天体物理学 Accretion”相关记录15条 . 查询时间(0.077 秒)
Comparing the Accretion Disk Evolution of Black Hole and Neutron Star X-ray Binaries from Low to Super-Eddington Luminosity
Accretion Disk Evolution Neutron Star X-ray Binaries Super-Eddington Luminosity
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2011/10/21
Low-mass X-ray binaries (LMXBs) are systems in which a low-mass companion transfers mass via Roche-lobe overflow onto a black hole (BH) or a weakly magnetized neutron star (NS). It is believed that bo...
Evidence for Low Black Hole Spin and Physically Motivated Accretion Models from Millimeter VLBI Observations of Sagittarius A*
black hole physics—Galaxy center—techniques interferometric—submillimeter—accretion accretion
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2010/11/15
Millimeter very-long baseline interferometry (mm-VLBI) provides the novel capacity to probe the emission region of a handful of supermassive black holes on sub-horizon scales. For Sagittarius A* (Sgr ...
Thin accretion discs around millisecond X-ray pulsars
accretion accretion discs – magnetic fields – MHD –stars magnetic fields –stars
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2010/11/15
Millisecond x-ray pulsars have weak magnetic dipole moments of ∼ 1016 Tm3 compared to ordinaryX-ray pulsars with dipolemoments of 1020 Tm3. For this reason a surrounding accretion
disc can exte...
Source to Accretion Disk Tilt
accretion accretion disks methods analytical accretion disks - instabilities
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2010/11/16
Many different system types retrogradely precess, and retrograde precession could be from a tidal torque by the secondary on a misaligned accretion disk. However, a source to cause and maintain disk t...
Connections Between Tilted Accretion Disks Around White Dwarfs and Substellar Companions
Substellar companions infrared excess debris disks protoplanetary disks exo-zodiacal dust
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2010/11/16
Accretion disks in white dwarf systems are believed to be tilted. In a recent publication, the lift force has been suggested to be a source to disk tilt, a source that is likely relevant to all accret...
On the Origin of Ultraviolet Emission and the Accretion Model of Low-luminosity AGNs
accretion accretion disks — black hole physics — galaxies active — quasars general — Ultraviolet general
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2010/11/12
Low-luminosity active galactic nuclei (LLAGNs) are generally believed to be powered by an inner radiatively inefficient, advection-dominated accretion flow (ADAF), an outer truncated thin disk, and a ...
The baroclinic instability in the context of layered accretion. Self-sustained vortices and their magnetic stability in local compressible unstratified models of protoplanetary disks
baroclinic instability magnetic stability protoplanetary disks
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2010/11/10
Context. Turbulence and angular momentum transport in accretion disks remain a topic of debate. With the realization that dead zones are robust features of protoplanetary disks, the search for hydrody...
Investigating accretion disk - radio jet coupling across the stellar mass scale
High Energy Astrophysical Phenomena (astro-ph.HE)
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2011/1/5
Relationships between the X-ray and radio behavior of black hole X-ray binaries during outbursts have established a fundamental coupling between the accretion disks and radio jets in these systems.
On the development of QPOs in Bondi-Hoyle accretion flows
High Energy Astrophysical Phenomena (astro-ph.HE) General Relativity and Quantum Cosmology (gr-qc)
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2010/12/28
The numerical investigation of Bondi-Hoyle accretion onto a moving black hole has a long history, both in Newtonian and in general-relativistic physics. By performing new two-dimensional and general-r...
Accretion in the spin-down regime
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/27
Accretion driven millisecond X-ray pulsars can accrete over a wide range of mass flow rates. The pulsations persist even at small accretion rates at which these objects would be expected to be in the ...
Accretion and Structure of Radiating Disks
Solar and Stellar Astrophysics (astro-ph.SR) High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/27
The structure of rotating disks is routinely found assuming a hydrostatic equilibrium. We study here a more satisfactory hydrostationary model that selfconsistently takes into account selfgravitation ...
Probing the accretion disk - jet connection via instabilities in the inner accretion flow. From microquasars to quasars
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/24
We present various instability mechanisms in the accreting black hole systems which might indicate at the connection between the accretion disk and jet. The jets observed in microquasars can have a pe...
Accretion Disks in Evolved Cataclysmic Variables
Solar and Stellar Astrophysics (astro-ph.SR)
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2010/12/22
We explore conditions and structure of accretion disks in short-period Cata- clysmic Variables (CVs), which have evolved beyond the period minimum. We show that accretion discs in systems with extreme...
Resistivity-driven State Changes in Vertically Stratified Accretion Disks
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/22
We investigate the effect of shear viscosity and Ohmic resistivity on the magnetorotational instability (MRI) in vertically stratified accretion disks through a series of local simulations computed wi...
Relativistic Dissipative Accretion Flow onto Black Hole
Extended Irreversible Thermodynamics (EIT) Black Hole
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2010/3/9
Dissipations, e.g. heat flow and bulk and shear viscosities, cause the transport of energy, momentum and angular momentum, which is the essence of accretion of matters onto celestial objects. Dissipat...