论文标题
多余的中间质量黑洞候选3xMM J215022.4-055108的多波长随访
Multiwavelength Follow-up of the Hyperluminous Intermediate-mass Black Hole Candidate 3XMM J215022.4-055108
论文作者
论文摘要
我们最近发现了X射线/光学爆发来源3xmm J215022.4-055108。最好将其解释为恒星的潮汐破坏，这是一个中间质量的黑洞，在一个大型恒星集群中，在一个大型恒星簇中，在d_l = 247 mpc的大型恒星簇中，巨大的恒星簇中的潮汐破坏。但是，我们不能完全排除银河冷却中子星作为来源的替代解释。为了进一步固定来源的性质，我们通过XMM-Newton和Hubble Space望远镜（HST）获得了新的多波长观测。新的HST图像中与源的光学对应物是少量解析的，它排除了源的银河冷却中子星的解释，并提出了半灯半径〜27 pc的星团。新的XMM-NEWTON观察表明，潮汐破坏事件的光度正在衰减，并且磁盘仍处于具有超柔软X射线频谱的热状态。因此，新的观察结果证实了该来源是最好的中间质量黑洞候选者之一。
We recently discovered the X-ray/optical outbursting source 3XMM J215022.4-055108. It was best explained as the tidal disruption of a star by an intermediate-mass black hole of mass of a few tens of thousand solar masses in a massive star cluster at the outskirts of a large barred lenticular galaxy at D_L=247 Mpc. However, we could not completely rule out a Galactic cooling neutron star as an alternative explanation for the source. In order to further pin down the nature of the source, we have obtained new multiwavelength observations by XMM-Newton and Hubble Space Telescope (HST). The optical counterpart to the source in the new HST image is marginally resolved, which rules out the Galactic cooling neutron star explanation for the source and suggests a star cluster of half-light radius ~27 pc. The new XMM-Newton observation indicates that the luminosity was decaying as expected for a tidal disruption event and that the disk was still in the thermal state with a super-soft X-ray spectrum. Therefore, the new observations confirm the source as one of the best intermediate-mass black hole candidates.
