标题： 超爱丁顿吸积的大质量黑洞作为长期存在的宇宙标准 显示英文标题

标题： Super-Eddington accreting massive black holes as long-lived cosmological standards

摘要： 超爱丁顿吸积大质量黑洞（SEAMBHs）由于薄吸积盘中的光子捕获和对流，在一定的吸积率以上达到饱和亮度。 我们表明，如果通过硬X射线观测正确识别这些SEAMBHs，特别是通过其2-10 keV连续谱的斜率，它们可以提供一种新的估计宇宙距离的工具。 为了验证这一想法，我们获得了60个窄线塞弗特1型星系的黑洞质量估计值和X射线数据，我们认为这些星系是最有希望的SEAMBH候选者。 我们证明，对于样本中的物体，通过新方法得到的距离随着硬X射线连续谱的变陡而更接近标准光度距离。 这些结果使我们能够分析在未来活动黑洞样本中使用该方法的要求，并证明在足够大的样本下，预期的不确定性可以使它们成为一种有用的新的宇宙学标尺。 显示英文摘要

摘要： Super-Eddington accreting massive black holes (SEAMBHs) reach saturated luminosities above a certain accretion rate due to photon trapping and advection in slim accretion disks. We show that these SEAMBHs could provide a new tool for estimating cosmological distances if they are properly identified by hard X-ray observations, in particular by the slope of their 2-10 keV continuum. To verify this idea we obtained black hole mass estimates and X-ray data for a sample of 60 narrow line Seyfert 1 galaxies that we consider to be the most promising SEAMBH candidates. We demonstrate that the distances derived by the new method for the objects in the sample get closer to the standard luminosity distances as the hard X-ray continuum gets steeper. The results allow us to analyze the requirements for using the method in future samples of active black holes and to demonstrate that the expected uncertainty, given large enough samples, can make them into a useful, new cosmological ruler.