论文标题
Aliii 1860和CIII的统计分析] 1909年排放线作为类星体中的病毒黑洞质量估计器
Statistical analysis of AlIII 1860 and CIII] 1909 emission lines as virial black hole mass estimators in quasars
论文作者
论文摘要
我们将中间电离线Aliii 1860和CIII]的有用性作为类星体的可靠病毒质量估计器。我们在红移范围内从SDSS DR16中确定了309个类星体的样本，以1.2 <z <1.4的形式在1860年的Aliii频谱中记录[OII] 3728，SIIIII 1890和CIIII] 1909年。然后，我们将这些来源分类为种群A，极端人口A（XA）和人口B，并使用多组分模型分析了1900Å的混合物，以寻找Aliii和CIII的系统线变化，并沿着类星体的主要序列进行了系统的变化。我们没有发现POP中ALIII线峰的显着变化。 B和大多数流行音乐。 A.对于流行音乐。 Xa观察到了一个中位数为-250 km/s的中值蓝光，激励了Aliii线曲线分解为以静止框架为中心的病毒化组件，以及用于流出发射的蓝光组件。对于流行音乐。 B对象，我们证明了适合红移非常宽的组件（VBC）的经验必要性，并在CIII中可以清楚地看到，并分析了对POP的物理含义。 B使用多云模拟的复合频谱。我们发现，使用Aliii和CIII]的黑洞质量估计始终如一，作为大部分人口A. aliii（甚至CIII）的病毒估计量）是POP的可靠病毒黑洞质量估计器。 A和B对象。 XA来源值得特别关注，因为在Aliii的线轮廓中观察到的明显的蓝光过量过量，尽管不如CIV 1549年观察到的那样大。
We test the usefulness of the intermediate ionisation lines AlIII 1860 and CIII] 1909 as reliable virial mass estimators for quasars. We identify a sample of 309 quasars from the SDSS DR16 in the redshift range 1.2 < z < 1.4 to have [OII] 3728 recorded on the same spectrum of AlIII 1860, SiIII 1890, and CIII] 1909. We set the systemic quasar redshift using careful measurements of [OII]. We then classified the sources as Population A, extreme Population A (xA) and Population B, and analysed the 1900Å blend using multi-component models to look for systematic line shifts of the AlIII and CIII] along the quasar main sequence. We do not find significant shifts of the AlIII line peak in Pop. B and the wide majority of Pop. A. For Pop. xA, a small median blueshift of -250 km/s was observed, motivating a decomposition of the AlIII line profile into a virialized component centred at rest-frame and a blueshifted component for an outflow emission. For Pop. B objects, we proved the empirical necessity to fit a redshifted very broad component (VBC), clearly seen in CIII], and analysed the physical implications on a Pop. B composite spectrum using CLOUDY simulations. We find consistent black hole mass estimations using AlIII and CIII] as virial estimators for the bulk of Population A. AlIII (and even CIII]) is a reliable virial black hole mass estimator for Pop. A and B objects. xA sources deserve special attention due to the significant blueshifted excess observed in the line profile of AlIII, although not as large as those observed in CIV 1549.
