Exploring the link between C iv outflow kinematics and sublimation-temperature dust in quasars
Exploring the link between C iv outflow kinematics and sublimation-temperature dust in quasars
复制标题
探索类星体中 C iv 流出运动学与升华温度尘埃之间的联系
DOI：
10.1093/mnras/staa3842
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发表时间：
2021
影响因子：
4.8
通讯作者：
Temple M
中科院分区：
文献类型：
--
作者：
Temple M
使用来自 SDSS、UKIDSS 和 WISE 的数据，我们研究了 ≃5000 个精心挑选的发光 (Lbol∼1047) 1 型类星体中红外发射的高频截止特性。 ≃2μm 发射强度，对应于中央连续源周围升华区中最热 () 灰尘的发射，观察到与 Civλ1550 发射线的蓝移相关。因此，我们发现具有较强核流出特征的物体往往具有较大的升华温度尘埃覆盖部分。当控制观察到的流出强度时，作为光度、黑洞质量或爱丁顿分数的函数，热尘埃覆盖分数在我们的样本中并没有显着变化。因此，热尘埃和席夫线蓝移之间的相关性，以及热尘埃和其他参数之间缺乏相关性，提供了类星体中宽发射线区域和红外发射尘埃区域的特性之间存在联系的证据。
Using data from SDSS, UKIDSS, andWISE, we investigate the properties of the high-frequency cutoff to the infrared emission in ≃5000 carefully selected luminous (Lbol∼ 1047) type 1 quasars. The strength of ≃2μm emission, corresponding to emission from the hottest () dust in the sublimation zone surrounding the central continuum source, is observed to correlate with the blueshift of the Civλ1550 emission line. We therefore find that objects with stronger signatures of nuclear outflows tend to have a larger covering fraction of sublimation-temperature dust. When controlling for the observed outflow strength, the hot dust covering fraction does not vary significantly across our sample as a function of luminosity, black hole mass, or Eddington fraction. The correlation between the hot dust and the Civline blueshifts, together with the lack of correlation between the hot dust and other parameters, therefore provides evidence of a link between the properties of the broad emission line region and the infrared-emitting dusty regions in quasars.