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Accretion and structure of radiating disks

机译:散热盘的吸积和结构

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摘要

We studied a steadily accreting, geometrically thick disk model that selfconsistently takes into account selfgravitation of the polytropic gas, its interaction with the radiation and the mass accretion rate. The accreting mass is injected inward in the vicinity of the central z?=?0 plane, where also radiation is assumed to be created. The rest of the disk remains approximately stationary. Only conservation laws are employed and the gas-radiation interaction in the bulk of the disk is described in the thin-gas approximation. We demonstrate that this scheme is numerically viable and yields a structure of the bulk that is influenced by the radiation and (indirectly) by the prescribed mass accretion rate. The obtained disk configurations are typical for environments in active galactic nuclei (AGNs), with the central mass of the order of 107 M⊙ to 108 M⊙, quasi-Keplerian rotation curves, disk masses ranging from about 106 M⊙ to 107 M⊙, and the luminosity ranging from 106 L⊙ to 109 L⊙. These luminosities are much lower than the corresponding Eddington limit.
机译:我们研究了一个稳定吸积,几何形状较厚的圆盘模型,该模型自始至终地考虑了多变气体的自重,其与辐射的相互作用以及质量积聚率。吸积物在中心z 0 =θ0平面附近被向内注入,这里也假定会产生辐射。磁盘的其余部分大致保持静止。仅采用守恒定律,并以稀薄气体近似描述圆盘主体中的气体-辐射相互作用。我们证明了该方案在数值上是可行的,并且产生了受辐射和(间接)受规定的质量积聚率影响的本体结构。所获得的磁盘结构是典型的活动银河原子核(AGNs)环境,其中心质量为107M⊙至108M⊙,准Keplerian旋转曲线,磁盘质量约为106M⊙至107M⊙。的亮度范围为106L⊙至109L⊙。这些亮度远低于相应的爱丁顿极限。

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