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arXiv 1801.07907astro-ph.GA
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来自重子振荡光谱巡天的类星体性质目录

A catalog of quasar properties from the Baryon Oscillation Spectroscopic Survey

Chen Zhi-Fu, Pan Da-Sheng, Pang Ting-Ting, Huang Yong

摘要:

利用重子振荡谱学巡天(BaryonOscillationSpectroscopicSurvey)中zem < 0.9的类星体,测量了类星体数据释放12(DR 12 Q)中缺少的Hbeta和Halpha光谱区附近的光谱特征,包括连续谱线和发射谱线。我们从宽的H α和/或\hbeta估计了维里黑洞的质量,并从O III 5007发射线推断了类星体的红移。所有的测量和导出量都是公开的。基于O III 5007的红移与DR 12 Q中包含的目视检查红移之间的比较表明,目视检查红移具有稳健性。我们发现宽H α和宽H β的半高宽是一致的,而宽H α的等效宽度和线亮度都明显大于宽H β的相应量。我们还发现,如果从文献中的经验关系推断出它们,则基于H β和H α的质量之间存在明显的系统性偏移。使用我们的大型类星体样本,我们已经改进了基于Hbeta和Halalpha的质量估计,通过最小化基于Hbeta和Halalpha的质量之间的差异。对于黑洞质量估计(方程(1)),我们发现对于H α,系数(a,b)=(7.00,0.50)和对于H β,系数(a,b)=(6.96,0.50)是最佳选择。

英文摘要:

Using the quasars with z_em < 0.9 from the Baryon Oscillation Spectroscopic Survey, we measure the spectral characteristics, including continuum and emission lines, around the Hbeta and Halpha spectral regions, which are lacking in Quasar Data Release 12 (DR12Q). We estimate the virial black hole mass from broad Halpha and/or \hbeta, and infer quasar redshifts from O III5007 emission lines. All the measurements and derived quantities are publicly available. The comparison between O III5007 based redshifts and the visual inspection redshifts included in DR12Q indicates that the visual inspection redshifts are robust. We find that the FWHMs of the broad Halpha are consistent with those of the broad Hbeta, while both the equivalent widths and line luminosities of the broad Halpha are obviously larger than the corresponding quantities of the broad Hbeta. We also find that there is an obviously systematic offset between the Hbeta and Halpha based mass if they are inferred from the empirical relationships in the literature. Using our large quasar sample, we have improved the Hbeta and Halpha based mass estimators by minimizing the difference between the Hbeta- and Halpha-based mass. For the black hole mass estimator (Equation (1)), we find that the coefficients (a,b)=(7.00,0.50) for the Halpha and (a,b)=(6.96,0.50) for the Hbeta are the best choices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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