STELLAR VELOCITY DISPERSION MEASUREMENTS IN HIGH-LUMINOSITY QUASAR HOSTS AND IMPLICATIONS FOR THE AGN BLACK HOLE MASS SCALE

We present new stellar velocity dispersion measurements for four luminous quasars with the Near-Infrared Integral Field Spectrometer instrument and the ALTAIR laser guide star adaptive optics system on the Gemini North 8 m telescope. Stellar velocity dispersion measurements and measurements of the supermassive black hole (BH) masses in luminous quasars are necessary to investigate the coevolution of BHs and galaxies, trace the details of accretion, and probe the nature of feedback. We find that higher-luminosity quasars with higher-mass BHs are not offset with respect to the MBH–σ* relation exhibited by lower-luminosity active galactic nuclei (AGNs) with lower-mass BHs, nor do we see correlations with galaxy morphology. As part of this analysis, we have recalculated the virial products for the entire sample of reverberation-mapped AGNs and used these data to redetermine the mean virial factor 〈f〉 that places the reverberation data on the quiescent MBH–σ* relation. With our updated measurements and new additions to the AGN sample, we obtain 〈f〉 = 4.31 ± 1.05, which is slightly lower than, but consistent with, most previous determinations.

我们利用双子座北8米望远镜上的近红外积分场光谱仪以及ALTAIR激光导星自适应光学系统，对四个亮类星体进行了新的恒星速度弥散测量。对亮类星体进行恒星速度弥散测量以及对超大质量黑洞（BH）质量的测量，对于研究黑洞和星系的共同演化、追踪吸积的细节以及探究反馈的性质是必要的。我们发现，具有更高质量黑洞的更高光度类星体相对于具有较低质量黑洞的较低光度活动星系核（AGN）所呈现的$M_{BH}-\sigma_*$关系并没有偏移，我们也没有看到与星系形态的相关性。作为这项分析的一部分，我们重新计算了整个 reverberation - mapped（反响映射）AGN样本的维里乘积，并利用这些数据重新确定了将反响数据置于静态$M_{BH}-\sigma_*$关系上的平均维里因子$\langle f\rangle$。通过我们更新的测量以及对AGN样本的新增内容，我们得到$\langle f\rangle = 4.31 \pm 1.05$，这比大多数先前的测定值略低，但与之相符。