论文标题
X射线亮度，星形形成率和恒星质量之间的半乳酸缩放关系
Sub-galactic scaling relations between X-ray luminosity, star-formation rate, and stellar mass
论文作者
论文摘要
来自高质量X射线二进制文件（HMXB）的X射线光度（$ L_X $）与主机Galaxy的恒星形成率（SFR）密切相关。我们在SFR中的$ {\ sim} $ 7 dex和$ {\ sim} $ 8 dex中的$ {\ sim} $ 7 dex探索了此连接。与已建立的关系达到$ {\ rm sfr {\ simeq} 10^{ - 3} \，m_ \ odot \，yr^{ - 1}} $，在此下方出现了过量的X射线亮度。这种过量可能来自低质量X射线二进制文件。 $ L_X $ -SFR关系的固有分散是恒定的，与SFR无关。不同的恒星形成指标以不同的方式以$ L_X $规模扩展，我们将差异归因于恒星形成历史的效果。源自H $α$的SFR显示与X射线光度最紧密的相关性，因为H $α$排放探针具有类似于HMXB形成时间标准的年龄的恒星种群，但H $α$ -BASED SFR仅对$ \ rm sssfr {> rm ssfr {>} 10^{ - 12^{-12} { - 12}} { - 12}} yr^{ - 1}/m_ \ odot $。
X-ray luminosity ($L_X$) originating from high-mass X-ray binaries (HMXBs) is tightly correlated with the host galaxy's star-formation rate (SFR). We explore this connection at sub-galactic scales spanning ${\sim}$7 dex in SFR and ${\sim}$8 dex in specific SFR (sSFR). There is good agreement with established relations down to ${\rm SFR {\simeq} 10^{-3}\,M_\odot \, yr^{-1}}$, below which an excess of X-ray luminosity emerges. This excess likely arises from low mass X-ray binaries. The intrinsic scatter of the $L_X$-SFR relation is constant, not correlated with SFR. Different star formation indicators scale with $L_X$ in different ways, and we attribute the differences to the effect of star formation history. The SFR derived from H$α$ shows the tightest correlation with X-ray luminosity because H$α$ emission probes stellar populations with ages similar to HMXB formation timescales, but the H$α$-based SFR is reliable only for $\rm sSFR{>}10^{-12}\,M_\odot \, yr^{-1}/M_\odot$.
