论文标题
Gaia在开放簇中形成的黑洞序列星星二进制二进制的可检测性
Gaia's Detectability of Black Hole-Main Sequence Star Binaries Formed in Open Clusters
论文作者
论文摘要
黑洞序列星（BH-MS）二进制文件是天文卫星{\ it Gaia}的未来数据释放的目标之一。它们应该在两个主要地点形成：银河场和星形簇。但是，以前的工作从未预测过源自后者地点的BH-MS二进制数量。在本文中，我们根据{\ it n} -body Simulates的结果估算了在开放簇中形成的BH-MS二进制数量，并可以用{\ it Gaia}检测到。通过考虑银河系（MW）和观察性约束的星际灭绝，我们可以预测$ \ sim 10 $ bh-ms二进制文件是可以观察到的。我们还发现，伴侣MSS的化学丰度模式将帮助我们确定二进制的起源为星团。这样的MSS不会受到BH祖细胞的流出，例如恒星风和超新星喷射。化学异常可能是一个很好的测试，以确认较小的MSS（$ \ lyssim 5M _ {\ odot} $），轨道时期（$ \ sim 1.5 \; $年）和更高的偏心率（$ e \ e \ gtrsim 0.1 $）的二进制文件的起源。
Black hole-main sequence star (BH-MS) binaries are one of the targets of the future data releases of the astrometric satellite {\it Gaia}. They are supposed to be formed in two main sites: a galactic field and star clusters. However, previous work has never predicted the number of BH-MS binaries originating in the latter site. In this paper, we estimate the number of BH-MS binaries formed in open clusters and detectable with {\it Gaia} based on the results of {\it N}-body simulations. By considering interstellar extinction in the Milky Way (MW) and observational constraints, we predict $\sim 10$ BH-MS binaries are observable. We also find that chemical abundance patterns of companion MSs will help us to identify the origin of the binaries as star clusters. Such MSs are not polluted by outflows of the BH progenitors, such as stellar winds and supernova ejecta. Chemical anomalies might be a good test to confirm the origin of binaries with relatively less massive MSs ($\lesssim 5M_{\odot}$), orbital periods ($\sim 1.5\;$year) and higher eccentricities ($e \gtrsim 0.1$).
