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arXiv 2305.01014astro-ph.GAastro-ph.CO
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斯隆数字巡天反响映射项目:关键结果

The Sloan Digital Sky Survey Reverberation Mapping Project: Key Results

Yue Shen, Catherine J. Grier, Keith Horne, Zachary Stone, Jennifer I. Li, Qian Yang, Yasaman Homayouni, Jonathan R. Trump, Scott F. Anderson, W. N. Brandt, Patr… 展开作者

Yue Shen, Catherine J. Grier, Keith Horne, Zachary Stone, Jennifer I. Li, Qian Yang, Yasaman Homayouni, Jonathan R. Trump, Scott F. Anderson, W. N. Brandt, Patrick B. Hall, Luis C. Ho, Linhua Jiang, Patrick Petitjean, Donald P. Schneider, Charling Tao, Fergus. R. Donnan, Yusra AlSayyad, Matthew A. Bershady, Michael R. Blanton, Dmitry Bizyaev, Kevin Bundy, Yuguang Chen, Megan C. Davis, Kyle Dawson, Xiaohui Fan, Jenny E. Greene, Hannes Groller, Yucheng Guo, Hector Ibarra-Medel, Yuanzhe Jiang, Ryan P. Keenan, Juna A. Kollmeier, Cassandra Lejoly, Zefeng Li, Axel de la Macorra, Maxwell Moe, Jundan Nie, Graziano Rossi, Paul S. Smith, Wei Leong Tee, Anne-Marie Weijmans, Jiachuan Xu, Minghao Yue, Xu Zhou, Zhimin Zhou, Hu Zou

AI总结:

本文基于SDSS-RM项目849个类星体的长期光变数据,测量了Halpha、Hbeta、MgII和CIV的反响映射滞后,更新了维里因子并改进了单历元黑洞质量估算公式。

摘要:

我们呈现斯隆数字巡天反响映射(SDSS-RM)项目的最终数据,该项目是SDSS-V黑洞测绘仪反响映射计划的前身。该数据集包括849个宽线类星体在红移范围0.1<z<4.5、光度范围Lbol=1E44-47.5 erg/s内的11年测光和7年光谱光变曲线,以及光谱和光变测量结果。我们利用SDSS-RM样本报告了宽Halpha、Hbeta、MgII和CIV(相对于光学连续谱光变)的23、81、125和110个反响映射滞后,覆盖了样本的大部分光度和红移范围。利用30个具有动力学建模黑洞质量的低红移反响映射活动星系核,我们对RMS光谱测得的谱线弥散导出了新的平均维里因子估计值<log f>=0.62+-0.07。单个维里因子的内禀弥散为0.31+-0.07 dex,表明反响映射黑洞质量存在两倍的系统不确定性。我们的滞后测量揭示了Hbeta和MgII在高红移处显著的R-L关系,与基于异质样本的最新测量结果一致。虽然由于光度的动力学范围有限,我们无法稳健地约束CIV的R-L关系斜率,但我们发现在固定L1350处CIV滞后的弥散显著更大。利用SDSS-RM滞后样本,我们为Hbeta、MgII和CIV导出了改进的单历元(SE)质量公式,这些公式在样本探测的光度范围内与各自的反响映射质量一致,也与来自两条不同谱线的单历元公式之间一致。新的Hbeta和MgII公式在给定反响映射质量下近似为无偏估计量,但CIV公式存在系统偏差。单历元质量相对于反响映射质量的内禀弥散对于Hbeta和MgII约为0.45 dex,对于CIV增加到约0.58 dex。

英文摘要:

We present the final data from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project, a precursor to the SDSS-V Black Hole Mapper Reverberation Mapping program. This data set includes 11-year photometric and 7-year spectroscopic light curves for 849 broad-line quasars over a redshift range of 0.1<z<4.5 and a luminosity range of Lbol=1E44-47.5 erg/s, along with spectral and variability measurements. We report 23, 81, 125, and 110 reverberation mapping lags (relative to optical continuum variability) for broad Halpha, Hbeta, MgII and CIV using the SDSS-RM sample, spanning much of the luminosity and redshift ranges of the sample. Using 30 low-redshift RM AGNs with dynamical-modeling black hole masses, we derive a new estimate of the average virial factor of <log f>=0.62+-0.07 for the line dispersion measured from the RMS spectrum. The intrinsic scatter of individual virial factors is 0.31+-0.07 dex, indicating a factor of two systematic uncertainty in RM black hole masses. Our lag measurements reveal significant R-L relations for Hbeta and MgII at high redshift, consistent with the latest measurements based on heterogeneous samples. While we are unable to robustly constrain the slope of the R-L relation for CIV given the limited dynamical range in luminosity, we found substantially larger scatter in CIV lags at fixed L1350. Using the SDSS-RM lag sample, we derive improved single-epoch (SE) mass recipes for Hbeta, MgII and CIV, which are consistent with their respective RM masses as well as between the SE recipes from two different lines, over the luminosity range probed by our sample. The new Hbeta and MgII recipes are approximately unbiased estimators at given RM masses, but there are systematic biases in the CIV recipe. The intrinsic scatter of SE masses around RM masses is ~0.45 dex for Hbeta and MgII, increasing to ~0.58 dex for CIV.

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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