论文标题
CIV排放线的特性和黑洞质量估计为Z〜3.5类星体的不确定性
CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
论文作者
论文摘要
使用高光度（$ l _ {\ rm bol} \ sim 10^{47.5} -10^{48.3} $ erg s $^{ - 1} $），高redshift（$ 3.2 <z <z <3.8 $）样本的19 Quasar sampe quasar sampe at 19 Quasar semal selive sely selver-splack seld self sectival and Invivrare sextration subliation，我们调查了我们调查的sellibalibose，我们调查了我们调查的sellibalibose，我们调查了我们调查的。 （$ m _ {\ rm bh} $）。基于CIV和H $β$ M _ {\ rm BH} $比率为0.110 DEX的中位数对数为0.110 DEX，散布为0.647 DEX。 CIV-H $β$ BH质量差异与CIV FWHM，Blueshift和不对称性显着相关。使用BlueShift和不对称性对CIV FWHM进行更正，将质量差异的散布降低了$ \ sim $ 0.04-0.2 dex。我们的样品中的类星体以爱丁顿的比率$ r _ {\ rm edd}> 0.3 $，并覆盖相当多的蓝光范围，其中18/19的类星体显示了civ blueshifts（中间价值（中位数）（中间价值为1126 km s $ s $^{ - 1} $），而Quasars则比500 QUASARS显示了QUASARS的14/19 Quiv civ。 s $^{ - 1} $。这表明并非所有具有高爱丁顿比率的类星体都显示出很大的蓝光。在1350 $ \ OVERSET {\ lower.5em \ Circ} {\ Mathrm {a}} $之间的Baldwin效果（REW）与1350 $ \ Overset {\ lower.5em \ Circ}} $之间的鲍德温效应可能是由于我们样本有限的亮度范围。我们发现复合谱的红翼缺乏通量，并具有较大的civ blueshift，并以rew $ _ {\ rm [oiii]}> 5 $ $ $ $ \ $ \ overset {\ lower.5em \ lower.5em \ circ} {cive vive cive pift luse collue colluse coll subs pluse pluse pluse pluse pluse pluse pluse pluse sill subs pluse pluse pluse pluse pluse sillif。它们更有可能是由爱丁顿比率和方向效应的组合引起的。
Using a high luminosity ($L_{\rm bol} \sim 10^{47.5} - 10^{48.3}$ erg s$^{-1}$), high redshift ($3.2 < z < 3.8$) quasar sample of 19 quasars with optical and near-infrared spectroscopy, we investigate the reliability of the CIV-based black hole mass estimates ($M_{\rm BH}$). The median logarithm of the CIV- and H$β$-based $M_{\rm BH}$ ratios is 0.110 dex with the scatter of 0.647 dex. The CIV-to-H$β$ BH mass differences are significantly correlated with the CIV FWHMs, blueshifts and asymmetries. Corrections of the CIV FWHM using the blueshift and asymmetry reduce the scatter of the mass differences by $\sim$ 0.04-0.2 dex. Quasars in our sample accrete at the Eddington ratio $R_{\rm EDD}>0.3$ and cover a considerable range of blueshifts, with 18/19 of the quasars showing CIV blueshifts (with the median value of 1126 km s$^{-1}$) and 14/19 of the quasars showing CIV blueshifts larger than 500 km s$^{-1}$. It suggests that not all quasars with high Eddington ratios show large blueshifts. The Baldwin effect between the CIV rest-frame equivalent width (REW) and the continuum luminosity at 1350 $\overset{\lower.5em\circ}{\mathrm{A}}$ is not seen, likely due to the limited luminosity range of our sample. We find a lack of flux in the red wing of the composite spectrum with larger CIV blueshift, and detect a higher ratio of [OIII] quasars with REW$_{\rm [OIII]}>5$ $\overset{\lower.5em\circ}{\mathrm{A}}$ in the subsample with lower CIV blueshift. It is more likely that they are caused by the combination of the Eddington ratio and the orientation effect.
