论文标题
在黑洞候选人GRS 1716-249中发现光流和流入
Discovery of optical outflows and inflows in the black hole candidate GRS 1716-249
论文作者
论文摘要
我们介绍了在2016 - 2017年爆发时，黑洞候选GRS GRS 1716-249（Nova Oph 1993）在2016 - 2017年爆发期间，使用GTC，VLT和盐望远镜获得的光谱（Nova Oph 1993）。我们的18个期间数据集跨越了6个月，并揭示了主要发射线的观察性能也很可变，即使在几个小时的时间尺度上也是如此。在H $α$，H $β$和He II（$λ$ 4686）发射线中，几个时期的特征是P-CYG（以及扁平和不对称）轮廓，这意味着可能存在积聚盘风，这很可能很热且浓密。风的终端速度（$ \ sim $ 2000 km s $^{ - 1} $）与其他黑洞X射线瞬变相似。这些线还显示出倒置的P-CYG曲线形式的短暂和尖锐的红移吸收。我们认为，这些配置文件可以通过以$ \ sim $ 1300 km s $^{ - 1} $存在的插入材料来解释。我们提出了一个失败的风场，以解释这种流入并讨论其他替代方案，例如高倾斜度系统中与积聚相关的结构（例如气流）产生的晦涩。
We present optical spectroscopy obtained with the GTC, VLT and SALT telescopes during the decline of the 2016-2017 outburst of the black hole candidate GRS 1716-249 (Nova Oph 1993). Our 18-epoch data set spans 6 months and reveals that the observational properties of the main emission lines are very variable, even on time scales of a few hours. Several epochs are characterised by P-Cyg (as well as flat-top and asymmetric) profiles in the H$α$, H$β$ and He II ($λ$4686) emission lines, implying the presence of an accretion disc wind, which is likely hot and dense. The wind's terminal velocity ($\sim$2000 km s$^{-1}$) is similar to that observed in other black hole X-ray transients. These lines also show transient and sharp red-shifted absorptions, taking the form of inverted P-Cyg profiles. We argue that these profiles can be explained by the presence of infalling material at $\sim$1300 km s$^{-1}$. We propose a failed wind scenario to explain this inflow and discuss other alternatives, such as obscuration produced by an accretion-related structure (e.g. the gas stream) in a high inclination system.
