[O III] emission line as a tracer of star-forming galaxies at high redshifts: comparison between Hα and [O III] emitters at z=2.23 in HiZELS
[O III] emission line as a tracer of star-forming galaxies at high redshifts: comparison between Hα and [O III] emitters at z=2.23 in HiZELS
复制标题
[O III] 发射线作为高红移恒星形成星系的示踪剂：HiZELS 中 z=2.23 处 Hα 和 [O III] 发射器之间的比较
DOI：
10.1093/mnras/stw1655
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
P. N.
中科院分区：
文献类型：
--
作者：
Suzuki;T. L.;Kodama;T.;Sobral;D.;Khostovan;A. A.;Hayashi;M.;Shimakawa;R.;Koyama;Y.;Tadaki;K.-i.;Tanaka;I.;Minowa;Y.;Yamamoto;M.;Smail;I.;Best;P. N.
利用高Z发射谱线测量得到的窄带选择样品，研究了Z = 2.23 H α和[Oiii] λ 5007发射体的性质.我们构建了两个样品的H α和[Oiii]发射体，并比较了它们的综合物理性质。我们发现，恒星质量的分布，尘埃消光，星星形成率（SFR），和特定的SFR（sSFR）是没有统计学差异的两个样本之间。当我们根据H α和/或[Oiii]发射线的探测结果将整个星系样本分成三个子样本时，大多数同时探测到H α和[Oiii]的源都显示log（sSFRUV）δ − 9.5。三个子样本的比较表明，具有强[Oiii]线发射的源往往具有我们研究的所有星系中最高的恒星形成活动。我们认为，[Oiii]发射线可以作为高红移星系的示踪物，特别适用于研究从地面上无法观测到H α发射的atz> 3的星系。
We investigate the properties ofz= 2.23 Hα and [Oiii] λ5007 emitters using the narrow-band-selected samples obtained from the High-zEmission Line Survey. We construct two samples of the Hα and [Oiii] emitters and compare their integrated physical properties. We find that the distribution of stellar masses, dust extinction, star formation rates (SFRs), and specific SFRs (sSFRs) is not statistically different between the two samples. When we separate the full galaxy sample into three subsamples according to the detections of the Hα and/or [Oiii] emission lines, most of the sources detected with both Hα and [Oiii] show log(sSFRUV) ≳ −9.5. The comparison of the three subsamples suggests that sources with strong [Oiii] line emission tend to have the highest star-forming activity out all galaxies that we study. We argue that the [Oiii] emission line can be used as a tracer of star-forming galaxies at high redshift, and that it is especially useful to investigate star-forming galaxies atz> 3, for which Hα emission is no longer observable from the ground.