论文标题
Abell 85的矮星银河系中的超浮装源：中间质量黑洞候选人
An Ultraluminous Supersoft Source in a Dwarf Galaxy of Abell 85: An Intermediate-Mass Black Hole Candidate
论文作者
论文摘要
我们使用档案Chandra X射线观测来研究大量矮星系，以检测积聚中间质量黑洞（IMBHS）。 IMBH有望居住在矮星系中，并在光度和X射线光谱方面产生特定的特定标志。我们报告了与Abell 85 Dwarf Galaxy相关的X射线源的发现，该银河系适合IMBH描述。据估计，主机银河系的恒星质量为2 $ \ times $ 10 $^8 $ $ m_ \ odot $，这使其成为有可能托管一个积聚黑洞的最小庞大星系之一。在1 keV下，在软带中检测到源，而在较高能量下未发现。 X射线光度为$ \ $ \ $ 10 $^{41} $ erg s $^{ - 1} $，使其比最发光的恒星质量超级超级发射器的发光幅度几乎高三个数量级。从星系恒星质量与黑洞质量关系中，我们估计质量位于中间状态。导致中间质量的另一种方法取决于预期超肥料发射与高积聚率相关的事实，即接近爱丁顿的限制。我们建议从银河中心（$ \ $ \ $ 1.8 kpc）观察到的X射线源的偏移是由于银河相互作用引起的，我们提供了支持黑洞活动与星系相互作用之间关系的文献中的证据。
We study a large sample of dwarf galaxies using archival Chandra X-ray observations, with the aim of detecting accreting intermediate-mass black holes (IMBHs). IMBHs are expected to inhabit dwarf galaxies and to produce specific signatures in terms of luminosity and X-ray spectra. We report the discovery of an X-ray source associated with an Abell 85 dwarf galaxy that fits the IMBH description. The stellar mass of the host galaxy is estimated to be 2 $\times$ 10$^8$ $M_\odot$, which makes it one of the least massive galaxies to potentially host an accreting black hole. The source is detected in the soft band, under 1 keV, while undetected at higher energies. The X-ray luminosity is $\approx$ 10$^{41}$ erg s$^{-1}$, making it almost three orders of magnitude more luminous than the most luminous stellar-mass supersoft emitters. From the galaxy stellar mass vs. black hole mass relation, we estimate the mass to be within the intermediate regime. Another method that resulted in an intermediate mass relies on the fact that supersoft emission is expected to be associated with high accretion rates, approaching the Eddington limit. We suggest that the observed offset of the X-ray source from the galactic center ($\approx$ 1.8 kpc) is due to galaxy interactions, and we present evidence from the literature that supports the relation between black hole activity and galaxy interactions.
