论文标题
低音XXVI：DR2主机Galaxy恒星速度分散
BASS XXVI: DR2 Host Galaxy Stellar Velocity Dispersions
论文作者
论文摘要
我们提出了484 SY 1.9的新中央恒星速度分散，并从Swift/BAT AGN光谱调查的第二个数据发布中提出了SY 2（Bass DR2）。这构成了最大的X射线速度分散测量研究研究，其中X射线散布的AGN被956个独立的测量，对Ca H+K和Mg B区域（3880-5550a）（3880-5550a）和CA Triplet区域（8350-8730a）（8350-8730a），主要来自642个光谱，主要来自VLT/XSHOOTER ORPALOMAR/DOUMESESCESC。我们的样品跨越速度分散40-360 km/s，对应于黑孔质量的4-5个数量级（MBH = 10^5.5-9.6 msun），降压光度（lbol〜10^{42-46 ergs/s）和Eddington的比率（42-46 ergs/s）和Eddington的比率对于281 AGN，我们的数据提供了第一个发表的中央速度分散体，其中包括6个具有低质量黑洞的AGN（MBH = 10^5.5-6.5 msun），这要归功于我们的高频谱分辨率观测值（Sigma〜25 km/s）。该调查代表了一项重大的进步，其中几乎完整的硬X射线被选为遮盖的AGN的人口普查，并测量了银河面外99％的附近AGN（z <0.1）。低音AGN的速度分散液比更多的光学选择的窄线AGN（即〜150 vs.〜100 km/s）具有更高的速度分散体，但并不偏向巨大的椭圆形（即> 250 km/s）的最高速度分散体。尽管有足够的光谱分辨率来解决与凸起的小黑洞（〜10^4-5 msun）相关的速度分散体，但我们没有发现大量的超级伊德丁顿AGN群体。使用黑洞影响球的估计值，直接恒星和黑洞质量测量可以使用现有的设施以超过100个低音AGN获得。
We present new central stellar velocity dispersions for 484 Sy 1.9 and Sy 2 from the second data release of the Swift/BAT AGN Spectroscopic Survey (BASS DR2). This constitutes the largest study of velocity dispersion measurements in X-ray selected, obscured AGN with 956 independent measurements of the Ca H+K and Mg b region (3880-5550A) and the Ca triplet region (8350-8730A) from 642 spectra mainly from VLT/Xshooter or Palomar/DoubleSpec. Our sample spans velocity dispersions of 40-360 km/s, corresponding to 4-5 orders of magnitude in black holes mass (MBH=10^5.5-9.6 Msun), bolometric luminosity (LBol~10^{42-46 ergs/s), and Eddington ratio (L/Ledd~10^{-5}-2). For 281 AGN, our data provide the first published central velocity dispersions, including 6 AGN with low mass black holes (MBH=10^5.5-6.5 Msun), discovered thanks to our high spectral resolution observations (sigma~25 km/s). The survey represents a significant advance with a nearly complete census of hard-X-ray selected obscured AGN with measurements for 99% of nearby AGN (z<0.1) outside the Galactic plane. The BASS AGN have higher velocity dispersions than the more numerous optically selected narrow line AGN (i.e., ~150 vs. ~100 km/s), but are not biased towards the highest velocity dispersions of massive ellipticals (i.e., >250 km/s). Despite sufficient spectral resolution to resolve the velocity dispersions associated with the bulges of small black holes (~10^4-5 Msun), we do not find a significant population of super-Eddington AGN. Using estimates of the black hole sphere of influence, direct stellar and gas black hole mass measurements could be obtained with existing facilities for more than ~100 BASS AGN.
