论文标题
探测快速X射线瞬变XRT 000519和XRT 110103的主机星系
Probing for the host galaxies of the fast X-ray transients XRT 000519 and XRT 110103
论文作者
论文摘要
在过去的几年中，$ \ sim $ 30 $ 30外层次快速X射线瞬变（FXRT）已被发现，主要是在Chandra和XMM-Newton数据中。他们的性质尚不清楚，拟议的起源包括双中性明星合并，涉及中间质量黑洞和白色矮人的潮汐破坏事件，或超新星冲击爆发。这三种有前途的机制的决定性区分需要了解FXRT能量，环境和/或宿主特性。我们介绍了FXRTS XRT 000519和XRT 110103和Gran Telescopio Canarias观测值的光学观察结果，用于搜索这些FXRTS的宿主星系。在$ g_s $，$ r_s $和$ r $ band图像中，我们在$ \ sim $ $ $ 1^{\ prime \ prime} $（68％置信度）X-RAY位置的XRT 000519 X射线位置的错误圈中检测到一个扩展源，并以$ G_S = $ g_s = $ 26.29 $ 26.29 $ 0.09的X射线位置。我们讨论了XRT 000519与可能的主机候选者有关各种可能距离的关联，我们得出的结论是，如果XRT 000519与宿主候选者相关联，则可能会排除超新星冲击突破场景。 XRT 110103附近没有发现主机银河系，直至$ r> 25.8 $的限制幅度。
Over the past few years, $\sim$30 extragalactic fast X-ray transients (FXRTs) have been discovered, mainly in Chandra and XMM-Newton data. Their nature remains unclear, with proposed origins including a double neutron star merger, a tidal disruption event involving an intermediate-mass black hole and a white dwarf, or a supernova shock breakout. A decisive differentiation between these three promising mechanisms for their origin requires an understanding of the FXRT energetics, environments, and/or host properties. We present optical observations obtained with the Very Large Telescope for the FXRTs XRT 000519 and XRT 110103 and Gran Telescopio Canarias observations for XRT 000519 designed to search for host galaxies of these FXRTs. In the $g_s$, $r_s$ and $R$-band images, we detect an extended source on the North-West side of the $\sim$ $1^{\prime\prime}$ (68% confidence) error circle of the X-ray position of XRT 000519 with a Kron magnitude of $g_s=$26.29$\pm$0.09 (AB magnitude). We discuss the XRT 000519 association with the probable host candidate for various possible distances, and we conclude that if XRT 000519 is associated with the host candidate a supernova shock breakout scenario is likely excluded. No host galaxy is found near XRT 110103 down to a limiting magnitude of $R>25.8$.
