解析Lyman连续辐射星系Tol 1247-232的X射线辐射
Resolving the X-ray emission from the Lyman continuum emitting galaxy Tol 1247-232
摘要：
钱德拉天文台对附近的莱曼连续体（LyC）发射星系Tol 1247-232的观测解析了X射线的发射，并显示它是由一个具有硬光谱（$Γ= 1.6 \pm 0.5$）和高光度（$(9 \pm 2) \times 10^{40} \rm \, erg \, s^{-1}$）的点状源所主导。与早期的XMM-牛顿观测相比，通量变化为2倍。因此，X射线的发射很可能来自一个吸积的X射线源：一个低光度的活动星系核或者一个或几个X射线双星。钱德拉的X射线源类似于哈罗11中的点状硬光谱（$Γ= 1.2 \pm 0.2$），高光度（$10^{41} \rm \, erg \, s^{-1}$）源，哈罗11是唯一一个被证实的X射线解析的LyC发射星系。我们讨论了吸积X射线源有助于LyC逃逸的可能性。
英文摘要：
Chandra observations of the nearby, Lyman-continuum (LyC) emitting galaxy Tol 1247-232 resolve the X-ray emission and show that it is dominated by a point-like source with a hard spectrum ($Γ= 1.6 \pm 0.5$) and a high luminosity ($(9 \pm 2) \times 10^{40} \rm \, erg \, s^{-1}$). Comparison with an earlier XMM-Newton observation shows flux variation of a factor of 2. Hence the X-ray emission likely arises from an accreting X-ray source: a low-luminosity AGN or one or a few X-ray binaries. The Chandra X-ray source is similar to the point-like, hard spectrum ($Γ= 1.2 \pm 0.2$), high luminosity ($10^{41} \rm \, erg \, s^{-1}$) source seen in Haro 11, which is the only other confirmed LyC-emitting galaxy that has been resolved in X-rays. We discuss the possibility that accreting X-ray sources contribute to LyC escape.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
