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首页> 外文期刊>The Astrophysical Journal. Supplement Series >Very large telescope spectropolarimetry of broad absorption line QSOs
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Very large telescope spectropolarimetry of broad absorption line QSOs

机译：宽吸收线QSO的超大望远镜光谱极化法

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摘要

We present spectropolarimetry of 19 confirmed and four possible bright, southern broad absorption line (BAL) quasars from the European Southern Observatory Very Large Telescope. A wide range of redshifts is covered in the sample (from 0.9 to 3.4), and both low- and high-ionization quasars are represented, as well as radio-loud and radio-quiet BALQSOs. We continue to confirm previously established spectropolarimetric properties of BALQSOs, including the generally rising continuum polarization with shorter wavelengths and comparatively large fraction with high broadband polarization (6 of 19 with polarizations >2%). Emission lines are polarized less than or similar to the continuum, except in a few unusual cases, and absorption troughs tend to have higher polarizations. A search for correlations between polarization properties has been done, identifying two significant or marginally significant correlations. These are an increase in continuum polarization with decreasing optical luminosity (increasing absolute B magnitude) and decreasing C IV emission-line polarization with increased continuum polarization.
机译：我们目前从欧洲南方天文台超大型望远镜观测到的19个已确认的和四个可能的明亮的，南部广吸收线（BAL）类星体的光谱极化仪。样本中涵盖了范围广泛的红移（从0.9到3.4），并且代表了低电离类星体和高电离类星体，以及大声和无声BALQSO。我们将继续确认先前建立的BALQSO的光谱极化特性，包括波长不断增加的连续谱普遍上升，而高宽带极化的分数则相对较大（19个样本中有6个极化> 2％）。发射线的极化程度小于或类似于连续体，但在少数异常情况下除外，吸收槽的极化程度更高。已经完成了对极化特性之间相关性的搜索，确定了两个显着或边际显着的相关性。这些是连续偏振态的增加，同时光度降低（绝对B幅值增加），而C IV发射线偏振度随着连续性偏振度的增加而降低。

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