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首页> 外文期刊>The Astrophysical journal >MASS FUNCTIONS OF THE ACTIVE BLACK HOLES IN DISTANT QUASARS FROM THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 3
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MASS FUNCTIONS OF THE ACTIVE BLACK HOLES IN DISTANT QUASARS FROM THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 3

机译：从斯隆数字天空调查数据发布3来看，远方石英中主动黑洞的质量函数

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摘要

We present the mass functions of actively accreting supermassive black holes over the redshift range 0.3 ≤ z ≤ 5 for a well-defined, homogeneous sample of 15,180 quasars from the Sloan Digital Sky Survey Data Release 3 (SDSS DR3) within an effective area of 1644 deg~2. This sample is the most uniform statistically significant subset available for the DR3 quasar sample. It was used for the DR3 quasar luminosity function, presented by Richards et al., and is the only sample suitable for the determination of the SDSS quasar black hole mass function. The sample extends from i = 15 to i = 19.1 at z approx＜ 3 and to i = 20.2 for z approx＞ 3. The mass functions display a rise and fall in the space density distribution of active black holes at all epochs. Within the uncertainties the high-mass decline is consistent with a constant slope of β ≈ -3.3 at all epochs. This slope is similar to the bright-end slope of the luminosity function for epochs below z = 4. Our tests suggest that the downturn toward lower mass values is due to incompleteness of the quasar sample with respect to black hole mass. Further details and analysis of these mass functions will be presented in forthcoming papers.
机译：我们提出了质量函数，在1644有效范围内，从Sloan Digital Sky Survey Data Release 3（SDSS DR3）的15180个类星体的明确定义的均匀样本中，主动转移了0.3≤z≤5的红移范围内的超质量黑洞deg〜2。该样本是可用于DR3类星体样本的最统一的统计上显着子集。它用于Richards等人提出的DR3类星体发光度函数，并且是唯一适合确定SDSS类星体黑洞质量函数的样本。样本在z大约＜3时从i = 15扩展到i = 19.1，在z大约＞ 3时从i = 20.2扩展。质量函数显示所有历时活动黑洞的空间密度分布的上升和下降。在不确定性范围内，高质量下降与所有时期的β≈-3.3的恒定斜率一致。对于z = 4以下的历时，该斜率类似于发光度函数的亮端斜率。我们的测试表明，向较低质量值的下降是由于类星体样品相对于黑洞质量的不完整所致。这些质量函数的进一步细节和分析将在以后的论文中介绍。

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