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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Broad Balmer-Line Absorption in SDSS J172341.10+555340.5
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Broad Balmer-Line Absorption in SDSS J172341.10+555340.5

机译：SDSS J172341.10 + 555340.5中的宽Balmer-Line吸收

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摘要

We present the discovery of Balmer-line absorption from Hα to H9 in an iron low-ionizaton broad absorption line (FeLoBAL) quasar, SDSS J172341.10+555340.5, by near-infrared spectroscopy with the Cooled Infrared Spectrograph and Camera for OHS (CISCO) attached to the Subaru Telescope. The redshift of the Balmer-line absorption troughs is 2.0530 ± 0.0003, and it is blueshifted by 5370 km s~)-1) from the Balmer emission lines. It is more than 4000 km s~(-1) blueshifted from the previously known UV absorption lines. We detected relatively strong (EW_(rest) = 20 ?) [OIII] emission lines that are similar to those found in other broad absorption line quasars with Balmer-line absorption. We also derived the column density of neutral hydrogen of 5.2 x 10~(17) cm~(-2) by using the curve of growth and taking account of Ly trapping. We searched for UV absorption lines that had the same redshift with Balmer-line absorption, and found AlIII and FeIII absorption lines at z = 2.053 that correspond to previously unidentified absorption lines, and the presence of other blended troughs that were difficult to identify.
机译：我们通过冷却红外光谱仪和OHS照相机（CISCO）通过近红外光谱法，发现了铁低电离宽吸收线（FeLoBAL）类星体SDSS J172341.10 + 555340.5中从Hα到H9的Balmer线吸收。 ）连接到斯巴鲁望远镜。巴尔默线吸收槽的红移为2.0530±0.0003，并且与巴尔默发射线发生红移5370 km s〜）-1）。它比以前已知的紫外线吸收线蓝移了4000 km s〜（-1）。我们检测到相对较强（EW_（rest）= 20？）的[OIII]发射谱线，与其他具有Balmer-line吸收的宽吸收谱线类星体中的发射谱线相似。利用生长曲线并考虑了Ly的俘获，我们还推导出了中性氢的柱密度为5.2 x 10〜（17）cm〜（-2）。我们搜索了具有与Balmer线吸收相同的红移的UV吸收线，发现在z = 2.053处的AlIII和FeIII吸收线与以前未确定的吸收线相对应，并且发现了其他难以识别的混合槽。

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