GRB 110328A/SWIFT J164449.3+573451: THE TIDAL OBLITERATION OF A DEEPLY PLUNGING STAR?
GRB 110328A/SWIFT J164449.3+573451: THE TIDAL OBLITERATION OF A DEEPLY PLUNGING STAR?
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DOI：
10.1088/0004-637x/742/1/32
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
J. Cannizzo;J. Cannizzo;E. Troja;G. Lodato
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文献类型：
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作者：
J. Cannizzo;J. Cannizzo;E. Troja;G. Lodato
我们检查潮汐破坏事件 (TDE) 场景来解释 Sw 1644+57，这是一个强大而持久的 X 射线源，突然以 GRB 110328A 的形式变得活跃。 z = 0.35 星系中心的精确定位表明中央引擎的活动是根本原因。我们看看 Bloom 等人的建议。 TDE 的可能性。我们认为，Sw 1644+57 不能用传统的 TDE 模型来解释，在传统的 TDE 模型中，近星体距离接近潮汐扰动半径——三个独立的论证线表明轨道必须深度下坠，否则我们观测到的强大喷流就无法产生。这些论点源于 (1) 将早期 X 射线光曲线与预期的理论回退率进行比较，(2) 研究向盘主导衰变过渡的时间，以及 (3) 考虑 TDE 率。由于潮汐力极度过剩，超出了扰乱近星体深陷轨道中恒星所需的最低限度，我们建议这种情况可以更描述性地称为潮汐湮灭事件（TOE），而不是潮汐消除事件。
We examine the tidal disruption event (TDE) scenario to explain Sw 1644+57, a powerful and persistent X-ray source which suddenly became active as GRB 110328A. The precise localization at the center of a z = 0.35 galaxy argues for activity of the central engine as the underlying cause. We look at the suggestion by Bloom et al. of the possibility of a TDE. We argue that Sw 1644+57 cannot be explained by the traditional TDE model in which the periastron distance is close to the tidal disruption radius—three independent lines of argument indicate the orbit must be deeply plunging or else the powerful jet we are observing could not be produced. These arguments stem from (1) comparing the early X-ray light curve to the expected theoretical fallback rate, (2) looking at the time of transition to disk-dominated decay, and (3) considering the TDE rate. Due to the extreme excess in the tidal force above that which would be required minimally to disrupt the star in a deeply plunging orbit at periastron, we suggest this scenario might be referred to more descriptively as a tidal obliteration event (TOE) rather than a TDE.