Quasar black hole masses and accretion rates across cosmic time
Quasar black hole masses and accretion rates across cosmic time
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DOI：
10.1017/s1743921320002392
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发表时间：
2019-03
期刊：
影响因子：
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通讯作者：
M. Brotherton;J. Maithil;A. Myers;O. Shemmer;B. Matthews;C. Dix;P. Du;Jian-Min Wang
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文献类型：
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作者：
M. Brotherton;J. Maithil;A. Myers;O. Shemmer;B. Matthews;C. Dix;P. Du;Jian-Min Wang
摘要类星体黑洞质量的估计通常是利用宽发射线在单历元光谱的基础上的标度关系确定的混响映射的小样本的低红移对象。已经确定了几个影响，需要修改这些标度关系，导致在高红移黑洞质量测定显着减少。纠正这些系统偏差对于理解黑洞和宿主星系性质之间的关系至关重要。我们正在完成一个使用双子座北望远镜的项目，称为双子座北红外光谱仪（GNIRS）远距离类星体巡天（DQS），它已经产生了大约200个高红移类星体（z = 1.5-3.5）的静止框架光谱。GNIRS-DQS将产生新的和改进的基于紫外线的黑洞质量和吸积率处方，以及测量反馈所需的高z类星体速度零点的新红移处方。
Abstract Quasar black hole masses are most commonly estimated using broad emission lines in single epoch spectra based on scaling relationships determined from reverberation mapping of small samples of low-redshift objects. Several effects have been identified requiring modifications to these scaling relationships, resulting in significant reductions of the black hole mass determinations at high redshift. Correcting these systematic biases is critical to understanding the relationships among black hole and host galaxy properties. We are completing a program using the Gemini North telescope, called the Gemini North Infrared Spectrograph (GNIRS) Distant Quasar Survey (DQS), that has produced rest-frame optical spectra of about 200 high-redshift quasars (z = 1.5–3.5). The GNIRS-DQS will produce new and improved ultraviolet-based black hole mass and accretion rate prescriptions, as well as new redshift prescriptions for velocity zero points of high-z quasars, necessary to measure feedback.