黑洞X射线双星的类氢类氦铁K_α发射线  

The Possibility of Hydrogen-like and Helium-like Iron K_α Line Emission from the Black Hole X-ray Binary

作　　者：许亚娣[1] 刘当波[1] 陈磊[1] 徐海光[1] 尤峻汉[1] 

机构地区：[1]上海交通大学物理系,上海200030

出　　处：《天文学报》2002年第3期284-292,共9页Acta Astronomica Sinica

基　　金：国家自然科学基金(10173016)资助项目

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.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.

关 键 词：Kα发射线 吸积盘 黑洞 恒星 GX339-4 X射线 双星 

分 类 号：P144.9[天文地球—天体物理] P172[天文地球—天文学]