标题： 三次候选潮汐瓦解事件的耀斑性质 显示英文标题

标题： On the nature of the flares from three candidate tidal disruption events

摘要： 2001年和2002年由钱德拉观测到的NGC 5905、RX J1242.6-1119A和RX J1624.9+7554的X射线耀斑被认为是潮汐瓦解事件的候选者。 从这些事件中观察到的独特特征可能用于确定被大质量黑洞潮汐瓦解的恒星类型。 我们研究了这三个事件，重点关注由于质量和半径之间不同关系导致的巨星和主序星潮汐瓦解的差异。 我们认为它们的X射线耀斑特性可以通过太阳型恒星外部层的部分剥离来建模。 排除了巨星潮汐瓦解的可能性。 这一结果可能有助于理解通过捕获恒星而非连续质量吸积来增长超大质量黑洞的方式。 显示英文摘要

摘要： The X-ray flares of NGC 5905, RX J1242.6-1119A, and RX J1624.9+7554 observed by Chandra in 2001 and 2002 have been suggested as the candidate tidal disruption events. The distinct features observed from these events may be used to determine the type of a star tidally disrupted by a massive black hole. We investigate these three events, focusing on the differences for the tidal disruption of a giant star and a main sequence, resulted from their different relation between the mass and the radius. We argue that their X-ray flare properties could be modeled by the partial stripping of the outer layers of a solar type star. The tidal disruption of a giant star is excluded completely. This result may be useful for understanding the growth of a supermassive black hole by capturing stars, versus the growth mode through continuous mass accretion.