论文标题
Rx J1301.9+2747的银河系核的X射线准周期喷发
X-ray quasi-periodic eruptions from the galactic nucleus of RX J1301.9+2747
论文作者
论文摘要
在最近发现了来自Galaxy GSN 069核的X射线准周期爆发（QPE）之后，我们在这里报告了名为RX J1301.9+2747的活性星系中QPE的检测。 QPE相对于稳定的静态水平，X射线计数速率的快速和反复增加一个数量级。在2019年5月30日和31日执行的XMM Newton观察期间，在RX J1301.9+2747的光曲线中检测到了三个持续大约半小时的强QPE。与第二和第三（约13 ks）相比，前两个QPE的复发时间更长（约20 k）。这种模式与GSN 069 QPE的交替长期复发时间一致，尽管连续复发时间之间的差异在GSN 069中明显较小。更长的X射线观察可以更好地阐明RX J1301.9+2747中QPE的时间模式，并可以使与GSN 069相比，可以使RX J1301.9+2747的QPE与详细的相比。 The X-ray spectral properties of QPEs in the two sources are remarkably similar, with QPEs representing fast transitions from a relatively cold and likely disk-dominated state to a state that is characterized by a warmer emission similar to the so-called soft X-ray excess, a component that is almost ubiquitously seen in the X-ray spectra of unobscured, radiatively efficient active galaxies.先前对2000年和2009年RX J1301.9+2747的X射线观察强烈表明QPE至少在过去的18。5年中存在。 GSN 069后，从第二个银河核中检测QPE，在两种情况下都排除了银河系来源的污染，因此应将QPE视为一种新型的与增强超级质量黑洞相关的新型外乳化现象。
Following the recent discovery of X-ray quasi-periodic eruptions (QPEs) coming from the nucleus of the galaxy GSN 069, here we report on the detection of QPEs in the active galaxy named RX J1301.9+2747. QPEs are rapid and recurrent increases of the X-ray count-rate by more than one order of magnitude with respect to a stable quiescent level. During a XMM-Newton observation lasting 48 ks that was performed on 30 and 31 May 2019, three strong QPEs lasting about half an hour each were detected in the light curves of RX J1301.9+2747. The first two QPEs are separated by a longer recurrence time (about 20 ks) compared to the second and third (about 13 ks). This pattern is consistent with the alternating long-short recurrence times of the GSN 069 QPEs, although the difference between the consecutive recurrence times is significantly smaller in GSN 069. Longer X-ray observations will better clarify the temporal pattern of the QPEs in RX J1301.9+2747 and will allow a detailed comparison with GSN 069 to be performed. The X-ray spectral properties of QPEs in the two sources are remarkably similar, with QPEs representing fast transitions from a relatively cold and likely disk-dominated state to a state that is characterized by a warmer emission similar to the so-called soft X-ray excess, a component that is almost ubiquitously seen in the X-ray spectra of unobscured, radiatively efficient active galaxies. Previous X-ray observations of RX J1301.9+2747 in 2000 and 2009 strongly suggest that QPEs have been present for at least the past 18.5 years. The detection of QPEs from a second galactic nucleus after GSN 069 rules out contamination by a Galactic source in both cases, such that QPEs ought to be considered a novel extragalactic phenomenon associated with accreting supermassive black holes.
