Outflows driven by cosmic-ray pressure in broad absorption line QSOs
Outflows driven by cosmic-ray pressure in broad absorption line QSOs
复制标题
宽吸收线 QSO 中宇宙射线压力驱动的流出
DOI：
10.1086/170731
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
M. Sikora
中科院分区：
文献类型：
--
作者：
M. Begelman;M. Kool;M. Sikora
结果表明，极端相对论中子从活动星系核的中心引擎逸出，可以产生强的快风，并且大部分加速都发生在宽发射线区之外。为了解释宽吸收线(BAL)类星体的观测，这一特征是必需的，在宽吸收线(BAL)类星体中，宽发射线的蓝色翅膀经常被吸收。确定了风的动力和热结构，并模拟了这种外流中BAL的形成，得出了谱线轮廓，并限制了能量或相对论质子转化为热能的速率，以便为BAL云提供压力限制。讨论了云的加速和生存问题。
It is shown how the escape of ultrarelativistic neutrons from the central engine of an AGN can lead to the production of a strong fast wind with most of the acceleration occurring outside the broad emission line region. This feature is required in order to explain observations of broad absorption line (BAL) QSOs, in which the blue wings of the broad emission lines are often absorbed. The dynamical and thermal structure of the wind is determined, and the formation of BALs in such an outflow is modeled, deriving line profiles and constraining the rate at which the energy or relativistic protons has be be converted to thermal energy in order to provide pressure confinement for the BAL clouds. The problem of acceleration and survival of the clouds is discussed.