搜索结果: 1-15 共查到“天文学 winds”相关记录52条 . 查询时间(0.17 秒)
Scientists map gusty winds in a far-off neutron star system（图）
中子星系统 阵风图 星系形成
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2023/6/9
An accretion disk is a colossal whirlpool of gas and dust that gathers around a black hole or a neutron star like cotton candy as it pulls in material from a nearby star. As the disk spins, it whips u...
York University astrophysicists detect ultra-fast winds near supermassive black hole
York University astrophysicists ultra-fast winds supermassive black hole
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2016/3/28
New research led by astrophysicists at York University has revealed the fastest winds ever seen at ultraviolet wavelengths near a supermassive black hole.“We’re talking wind speeds of 20 per cent the ...
Metal enrichment of the intergalactic medium at z=3 by galactic winds
galactic winds intergalactic medium
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2014/12/26
Studies of quasar absorption lines reveal that the low-density intergalactic medium (IGM) at z ~ 3 is enriched to between 10-3 and 10-2 solar metallicity. This enrichment may have occurred in an early...
Enrichment of the High-Redshift IGM by Galactic Winds
High-Redshift IGM Galactic Winds
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2014/12/26
This paper discusses a semi-numerical method of investigating
the enrichment of the intergalactic medium by galactic winds. We
find that most galaxies at z ～ > 3 should be driving winds, and that (i...
Non-equilibrium ionization model for stellar cluster winds and its application
NGC 3603 general
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2014/12/23
We have developed a self-consistent physical model for superstellar cluster winds based on combining a 1D steady-state adiabatic wind solution and a non-equilibrium ionization calculation. Comparing w...
Evolution of Super Star Cluster Winds with Strong Cooling
Evolution Super Star Cluster Winds Strong Cooling
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2011/10/18
We study the evolution of Super Star Cluster (SSC) winds driven by stellar winds and supernova (SN) explosions. Time-dependent rates at which mass and energy are deposited into the cluster volume, as ...
Modelling interaction of relativistic and non-relativistic winds in binary system PSR B1259-63/SS2883 - II. Impact of magnetization and anisotropy of the pulsar wind
HD – shock waves - pulsars: binaries
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2011/10/19
In this paper, we present a numerical study of the properties of the flow produced by the collision of a magnetized anisotropic pulsar wind with its environment in binary system. We compare the impact...
Radiation-driven winds of hot luminous stars. XVI. Expanding atmospheres of massive and very massive stars and the evolution of dense stellar clusters
Radiation mechanisms: general – Methods: numerical – Radiative transfer – early Universe – Stars: early-type – mass- loss – stellar winds – very massive stars – stellar evolution
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2011/9/27
Context: Starbursts, and particularly their high-mass stars, play an essential role in the evolution of galaxies. The winds of massive stars not only significantly influence their surroundings, but th...
High spatial resolution monitoring of the activity of BA supergiant winds
High spatial resolution the activity BA supergiant winds
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2011/1/13
There are currently two optical interferometry recombiners that can provide spectral resolutions better than 10000, AMBER/VLTI operating in the H-K bands, and VEGA/CHARA, recently commissioned, opera...
Powerful Winds from Low-Mass Stars: V374 Peg
Powerful Winds Low-Mass Stars V374 Peg
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2011/1/10
The rapid rotation (P=0.44 d) of the M dwarf V374Peg (M4) along with its intense magnetic field point toward magneto-centrifugal acceleration of a coronal wind. In this work, we investigate the struct...
The Physics of Disk Winds, Jets,and X-ray Variability in GRS 1915+105
Disk Winds Jets X-ray Variability
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2011/1/11
We present new insights about accretion and ejection physics based on joint RXTE/Chandra HETGS studies of rapid X-ray variability in GRS 1915+105. For the first time, with fast phase-resolved spectros...
Strong [O III] and [N II] emission lines in globular clusters from photoionized R Corona Borealis star winds
emission lines globular clusters
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2011/1/13
The globular cluster X-ray source CXO J033831.8-352604 in NGC 1399 has recently been found to show strong emission lines of [O III] and [N II] in its optical spectrum in addition to ultraluminous X-ra...
Spiralling out of control: 3D hydrodynamical modelling of the colliding winds in $\eta\thinspace$Carinae
hydrodynamics stars:early-type X-rays stars - stars binaries - stars:winds
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2010/11/10
Three dimensional (3D) adaptive-mesh refinement (AMR) hydrodynamical simulations of the windwind collision between the enigmatic super-massive star η Car and its mysterious companion star are presente...
On the source of dense outflows from T Tauri Stars. and III. Winds driven from the star-disc shear layer
stars pre-main-sequence stars: winds outflows stars circumstellar matter – stars formation
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2010/11/11
Ultraviolet observations of classical T Tauri Stars (cTTSs) have shown that there is a hot (Te ≃ 80, 000 K) and dense (ne ≃ 1010 cm−3) component associated with the large scale jet. ...
The interactions of winds from massive young stellar objects
interactions of winds massive young stellar objects
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2010/11/10
The supersonic stellar and disk winds possessed by massive young stellar objects will produce
shocks when they collide against the interior of a pre-existing bipolar cavity (resulting from an earlier...