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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >A search for Ly alpha emitters around a concentrated region of strong Ly alpha absorbers at z=2.3
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A search for Ly alpha emitters around a concentrated region of strong Ly alpha absorbers at z=2.3

机译：在Z = 2.3的强LYα吸收器上搜索围绕着集中区域的α发射器

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摘要

In order to investigate the physical relationship between strong Ly alpha absorbers (log N-HI >= 20.0 cm(-2)) such as damped Ly a absorption systems (DLAs) and young star-forming galaxies at high redshift, we have conducted narrow-band observations of Ly a emitters (LAEs) in a concentrated region of strong Ly alpha absorbers at z = 2.3, the J1230+34 field. Using a catalog of Ly alpha absorbers with log N-HI >= 20.0 cm(-2) based on the Baryon Oscillation Spectroscopic Survey, we found six fields where three or more absorbers are concentrated within a (50 Mpc)(3) cubic box in the comoving scale. Among them, we focus on the J1230+34 field, where two DLAs and two sub-DLAs are present. Our narrow-band imaging observations with Subaru/Suprime-Cam using a custom-made filter, NB400 (lambda(c) = 4003 angstrom and FWHM = 92 angstrom) yield a sample of 149 LAEs in this field. In the large scale (similar to 50 Mpc), we have found no differences between the obtained Ly a luminosity function and those in the blank fields at similar redshifts. We also compare the frequency distribution of the Ly a rest-frame equivalent width (EW0) in the target field and other fields including both overdensity region and blank field, but find no differences. On the other hand, in the small scale (similar to 10 Mpc), we have found a possible overdensity of LAEs around a DLA with the highest HI column density (N-HI = 21.08 cm(-2)) in the target field while there are no density excesses around the other absorbers with a lower N-HI.
机译：为了研究强Lyα吸收剂（Log N-Hi> = 20.0cm（-2））之间的物理关系，例如阻尼Ly吸收系统（DLA）和高射频的年轻星形星系，我们进行了窄Z = 2.3的强Lyα吸收剂浓缩区域中的发射器（Laes）的带观察，J1230 + 34场。使用具有Log N-Hi> = 20.0cm（-2）的Lyα吸收器目录，基于Baryon振荡光谱测量，我们发现了六个领域，其中三个或更多吸收剂集中在（50MPC）（3）立方盒内在Comoving秤中。其中，我们专注于J1230 + 34字段，其中存在两个DLA和两个子DLA。我们使用定制过滤器Nb400（Lambda（C）= 4003埃和FWHM = 92埃致振动凸轮的窄带成像观测，使用定制过滤器，NB400（Lambda（C）= 4003埃）在该领域中产生149个Laes的样品。在大规模（类似于50 MPC）中，我们发现所获得的LY亮度函数与类似红移的空白字段之间的差异没有差异。我们还在目标字段和其他字段中比较了LY A休息等效宽度（EW0）的频率分布，包括过度密度区域和空白字段，但没有发现差异。另一方面，在小规模（类似于10 MPC）中，我们发现了在目标场中的最高柱密度（N-HI = 21.08cm（-2））的DLA周围的Laes的可能过度在其他吸收器周围没有密度过量，其中N-Hi较低。

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