【摘要】 用径移主导吸积流模型(ADAF)不仅可以成功解释很多低吸积率天体的连续谱辐射,也可以说明X射线波段的谱线发射,而后者目前尚少有讨论.以黑洞X射线双星GX339-4处在低吸积率的宁静态情况为例,计算了它的铁线发射,表明在ADAF情况下的确可以产生足够强的可以在观测上检测的类氢和类氦铁Kα线.更多还原

【Abstract】 The iron K line emission from the black hole X-ray binary GX339-4 in the ’off’ state is calculated. It is shown that the black hole which accretes via ADAF (advection-dominated accretion flow) with very low accretion rate might produce detectable H-like and He-like iron K lines of sufficient strength . Although ADAF model has been applied successfully in explaining the continuum spectra of many low accretion rate systems. The line emission from ADAF has rarely been discussed till now.更多还原