论文标题
在黑洞瞬态Maxi J1348-630周围的巨型X射线灰尘散射环，用SRG/Erosita发现
A giant X-ray dust scattering ring around the black hole transient MAXI J1348-630 discovered with SRG/eROSITA
论文作者
论文摘要
我们在第一次X射线全套调查中，与SRG/Erosita一起报告了黑洞瞬态Maxi J1348-630周围发现的巨大灰尘散射环。在2020年2月的发现观察期间，该环的外径为1.3度，到2020年8月第二次全天空调查扫描时，它的外径生长到1.6度。这使得新的防尘环迄今观察到了最大的X射线散射环。灰尘散射光环，尤其是在瞬态源周围发现的环，为原始X射线源提供了精确距离测量的可能性。我们结合了来自SRG/Erosita，XMM-Newton，Maxi和Gaia的数据，以测量Maxi J1348-630的几何距离。 Gaia数据将散射灰尘放在2050 PC的距离上，从测得的时间滞后和环的几何形状，我们发现Maxi J1348-630的距离为3390 PC，统计不确定性仅为1.1％，系统不确定性仅为Gaia的统计不确定性，而系统不确定性为10％。该结果使Maxi J1348-630成为最确定距离的黑洞瞬变之一。新的距离导致对11+-2太阳能的黑洞进行了修订的质量估计，在爆发期间向软状态的过渡发生在Maxi J1348-630的隆隆光度达到其Eddington亮度的1.7％时。
We report the discovery of a giant dust scattering ring around the Black Hole transient MAXI J1348-630 with SRG/eROSITA during its first X-ray all-sky survey. During the discovery observation in February 2020 the ring had an outer diameter of 1.3 deg, growing to 1.6 deg by the time of the second all sky survey scan in August 2020. This makes the new dust ring the by far largest X-ray scattering ring observed so far. Dust scattering halos, in particular the rings found around transient sources, offer the possibility of precise distance measurements towards the original X-ray sources. We combine data from SRG/eROSITA, XMM-Newton, MAXI, and Gaia to measure the geometrical distance of MAXI J1348-630. The Gaia data place the scattering dust at a distance of 2050 pc, from the measured time lags and the geometry of the ring, we find MAXI J1348-630 at a distance of 3390 pc with a statistical uncertainty of only 1.1% and a systematic uncertainty of 10% caused mainly by the parallax offset of Gaia. This result makes MAXI J1348-630 one of the black hole transients with the best determined distances. The new distance leads to a revised mass estimate for the black hole of 11+-2 solar masses, the transition to the soft state during the outburst occurred when the bolometric luminosity of MAXI J1348-630 had reached 1.7% of its Eddington luminosity.
