探测SFXTs中的星云恒星风
Probing Clumpy Stellar Winds in SFXTs
摘要：
通过对SFXTs硬X射线变率的研究，可以得到对大质量恒星风聚集的定量约束。在这些系统中，很大一部分硬X射线是以耀斑的形式发射的，典型的持续时间为3千秒，频率为7天，亮度为$10^{36}$尔格/秒。这种耀斑很可能是由在$\sim10$ R $_*$轨道上运行的致密物体与风团（$10^{22-23}$ g）相互作用而发射的。团块和团块间培养基之间的密度比为$10^{2-4}$。团簇和团簇间介质的参数与宏观团簇情景和线驱动不稳定性模拟吻合良好。
英文摘要：
Quantitative constraints on the wind clumping of massive stars can be obtained from the study of the hard X-ray variability of SFXTs. In these systems, a large fraction of the hard X-ray emission is emitted in the form of flares with typical duration of 3 ksec, frequency of 7 days and luminosity of $10^{36}$ ergs/s. Such flares are most probably emitted by the interaction of a compact object orbiting at $\sim10$ R$_*$ with wind clumps ($10^{22-23}$ g). The density ratio between the clumps and the inter-clump medium is $10^{2-4}$ . The parameters of the clumps and of the inter-clump medium are in good agreement with macro-clumping scenario and line-driven instability simulations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
