维里质量估计偏差对类星体吸积宇宙同步的影响
Effects of Biases in Virial Mass Estimation on Cosmic Synchronization of Quasar Accretion
摘要：
最近的工作，使用维里质量估计和类星体的质量-光度平面产生了一些新的困惑，关于类星体吸积，包括一个亚爱丁顿边界上的大多数类星体吸积，吸积率从宿主星系的属性几乎独立，和宇宙同步的吸积之间的黑洞的共同质量。我们考虑如何这些难题可能会改变，如果维里质量估计原来有一个系统的偏见。作为例子，我们考虑最近的两个索赔的质量依赖性的偏见，镁II群众。在任何这样的修正下，令人惊讶的宇宙类星体吸积速率的同步性和与宿主星系的独立性仍然存在。亚爱丁顿边界的斜率和位置对维里质量估计的偏差非常敏感，各种质量校准似乎有利于不同的可能的物理解释中央黑洞和它的环境之间的反馈。所考虑的替代质量估计并不是简单地消除令人困惑的类星体行为，而是用新的难题来取代它，这些难题可能比使用当前维里质量估计和Shen et al.（2008）目录更难解决。
英文摘要：
Recent work using virial mass estimates and the quasar mass-luminosity plane has yielded several new puzzles regarding quasar accretion, including a sub-Eddington boundary on most quasar accretion, near-independence of the accretion rate from properties of the host galaxy, and a cosmic synchronization of accretion among black holes of a common mass. We consider how these puzzles might change if virial mass estimation turns out to have a systematic bias. As examples, we consider two recent claims of mass-dependent biases in MgII masses. Under any such correction, the surprising cosmic synchronization of quasar accretion rates and independence from the host galaxy remain. The slope and location of the sub-Eddington boundary are very sensitive to biases in virial mass estimation, and various mass calibrations appear to favor different possible physical explanations for feedback between the central black hole and its environment. The alternative mass estimators considered do not simply remove puzzling quasar behavior, but rather replace it with new puzzles that may be more difficult to solve than those using current virial mass estimators and the Shen et al. (2008) catalog.
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