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Radiatively-suppressed spherical accretion under relativistic radiative transfer

机译:相对论辐射转移下的辐射抑制的球形吸积

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We numerically examine radiatively-suppressed relativistic spherical accretion flows on to a central object with mass M under Newtonian gravity and special relativity. We simultaneously solve both the relativistic radiative transfer equation and the relativistic hydrodynamical equations for spherically symmetric flows under the double iteration process in the case of the intermediate optical depth. We find that the accretion flow is suppressed, compared with the freefall case in the nonrelativistic regime. For example, in the case of accretion on to a luminous core with accretion luminosity L-*, the freefall velocity v normalized by the speed of light c under the radiative force in the nonrelativistic regime is beta((r) over cap) = v/c = -root(1 - Gamma(*))/((r) over cap + 1 - Gamma(*)), where Gamma(*) (equivalent to L-*/L-E, L-E being the Eddington luminosity) is the Eddington parameter and (r) over cap (= r/r(S), r(S) being the Schwarzschild radius) the normalized radius, whereas the infall speed at the central core is similar to 0.7 beta(1), irrespective of the mass-accretion rate. This is due to the relativistic effect; the comoving flux is enhanced by the advective flux. We briefly examine and discuss an isothermal case, where the emission takes place in the entire space.
机译:我们在数值上检查辐射的相对论球形吸收流向牛顿重力和特殊相对性的质量m的中央物体。在中间光学深度的情况下,我们同时解决了在双重迭代过程下进行相对论的辐射传递方程和用于球体对称流的相对论流体动力学方程。与非素描制度中的自由落体案相比,我们发现抑制了空转流量。例如,在具有增生亮度L- *的发光芯的情况下,在非筛选状态下的辐射力下通过光C的速度归一化的自由落体速度V是β((r)上帽)= v / c = -Root(1 - γ(*))/((r)上帽+ 1 - γ(*)),其中γ(*)(相当于L - * / Le,Le是Eddington Luminosity)是eDDIDTON参数和(r)上的帽(= r / r(s),r(s)是施瓦茨兰兹半径)归一化半径,而中央核心的INFALL速度类似于0.7 beta(1),无论质量增生率。这是由于相对论的效果;通过平程通量增强了COMOVING FORUX。我们简要审查并讨论等温案,其中排放在整个空间中发生。

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