搜索结果: 1-15 共查到“天文学 Flows”相关记录24条 . 查询时间(0.593 秒)
A common feature of the X-ray bubbles observed in Chandra images of some "cooling flow" clusters is that they appear to be surrounded by bright, cool shells. Temperature maps of a few nearby luminous ...
Radial Gas Flows in Colliding Galaxies: Connecting Simulations and Observations
interactions kinematics and dynamics
2014/12/24
We investigate the detailed response of gas to the formation of transient and long-lived dynamical structures induced in the early stages of a disk-disk collision and identify observational signatures...
Gaia: a Window to Large Scale Flows
Gaia Window Large Scale Flows redshifts galaxy distances
2012/2/21
Using redshifts as proxy for galaxy distances, estimates of the 2D transverse peculiar velocities of distant galaxies ($cz\ltsim 2\times 10^4 \kms$) can be obtained from Gaia's measurements of proper ...
Joint downscale fluxes of energy and potential enstrophy in rotating stratified Boussinesq flows
Turbulent ows Strati ed ows Rotating ows
2011/10/14
We employ a coarse-graining approach to analyze nonlinear cascades in Boussinesq flows using high-resolution simulation data. We derive budgets which resolve the evolution of energy and potential enst...
Subsurface flows associated with rotating sunspots
Sun helioseismology, Sun interior, (Sun) sunspots
2011/10/19
In this paper, we compare components of the horizontal flow below the solar surface in and around regions consisting of rotating and non-rotating sunspots. Our analysis suggests that there is a signif...
The Kelvin-Helmholtz instability in weakly ionised plasmas: Ambipolar dominated and Hall dominated flows
mhd – instabilities – ISM:clouds – ISM:kinematics and dynamics
2011/10/12
The Kelvin-Helmholtz instability is well known to be capable of converting well-ordered flows into more disordered, even turbulent, flows. As such it could represent a path by which the energy in, for...
Observations of the most distant bright quasars imply that billion solar mass supermassive black holes (SMBH) have to be assembled within the first eight hundred million years. Under our standard gala...
General-relativistic model of hot accretion flows with global Compton cooling
accretion, accretion discs – black hole physics – X-rays: binaries – X-rays:general
2011/9/28
We present a model of optically thin, two-temperature, accretion flows using an exact Monte Carlo treatment of global Comptonization, with seed photons from synchrotron and bremsstrahlung emission, as...
The multi-stream flows and the dynamics of the cosmic web
cosmic web cosmological simulations cosmic flows
2010/11/12
A new numerical technique to identify the cosmic web is proposed. It is based on locating multi-stream flows, i.e. the places where the velocity field is multi-valued. The method is local in Eulerian ...
Properties of Accretion Flows Around Coalescing Supermassive Black Holes
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
2010/12/29
What are the properties of accretion flows in the vicinity of coalescing supermassive black holes (SBHs)? The answer to this question has direct implications for the feasibility of coincident detectio...
On the development of QPOs in Bondi-Hoyle accretion flows
High Energy Astrophysical Phenomena (astro-ph.HE) General Relativity and Quantum Cosmology (gr-qc)
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...
Shadows and photoevaporated flows from neutral clumps exposed to two ionizing sources
Shadows ionizing sources photoevaporate
2009/6/30
Shadows and photoevaporated flows from neutral clumps exposed to two ionizing sources。
Hydrodynamic modelling of accretion flows。
Accretion flows in magnetic cataclysmic variables
Accretion flows magnetic cataclysmic variables
2009/6/17
Accretion flows in magnetic cataclysmic variables。
Physical Scenarios for Supersonic Gas Flows Observed in H II Regions
Supersonic Gas Flows H II Regions
2009/6/16
Physical Scenarios for Supersonic Gas Flows Observed in H II Regions。