Spectrophotometry and Photometry for Five Blazars and Their Central Black Hole Masses
Spectrophotometry and Photometry for Five Blazars and Their Central Black Hole Masses
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DOI：
10.1086/497163
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发表时间：
2005-12
期刊：
影响因子：
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通讯作者：
G. Xie;H. T. Liu;G. Cha;S. Zhou;L. Ma;Z. Xie;L. E. Chen
中科院分区：
文献类型：
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作者：
G. Xie;H. T. Liu;G. Cha;S. Zhou;L. Ma;Z. Xie;L. E. Chen
我们用分光光度法观测了5个光学剧烈变异性类星体的样本，这些类星体在1994年以来的光学监测活动中已经观测到它们的短时尺度光学变异性。利用黑洞质量与其余波长5100 Å处光学连续光度的关系，我们推导出黑洞中心质量MBH。我们还使用快速变化的时间尺度和我们的黑洞质量估计新公式估计了相关的黑洞质量，MH。log MBH/MH的差值受| log MBH/MH|≤0.62的限制，说明快速变时标法和混响映射法估计黑洞质量的方法是可靠的。我们还讨论了PKS 1510-089双峰Hβ发射线的起源，并指出双峰Hβ发射线很可能主要是由围绕中心Kerr黑洞的非轴对称吸积盘产生的。
We have spectrophotometrically observed a sample of five optically violently variable quasars, for which short-timescale optical variabilities have been observed during our optical monitoring campaign since 1994. Using the relationship between black hole masses and optical continuum luminosity at the rest wavelength of 5100 Å, we derived the central black hole masses, MBH. We also estimated the relevant black hole masses, MH, using rapid-variability timescales and our new formula for black hole mass estimates. The differences log MBH/MH are limited by | log MBH/MH| ≤ 0.62, which implies that the two methods of estimating black hole masses by the rapid-variability timescales and the reverberation mapping method should be reliable. We also discuss the origin of the double-peaked Hβ emission line in PKS 1510-089 and show it to be probable that the double-peaked Hβ emission line is mainly produced by a nonaxisymmetric accretion disk surrounding the central Kerr black hole.