论文标题
Subaru/HSC Z-broadband过量选择极端排放线星系在z <1处
Subaru/HSC z-Broadband Excess Selection of Extreme Emission Line Galaxies at z<1
论文作者
论文摘要
我们提出了搜索宇宙和北黄极（NEP）Z <1处的极端发射线星系（EELG），并从Subaru/Hyper Suprime-CAM（HSC）和新的和现有的光谱镜结合使用。我们根据Z宽带中的大量过量通量选择EELG，该宽带对H $α$ 0.3 <Z <0.42和[OIIII] $λ$ 5007在0.7 <z <0.86敏感。我们在COSMOS数据集中识别出10,470个星系，在NEP场中识别91,385个星系。我们将Cosmos EELG样品与ZCOSMOS和DEIMOS 10K光谱目录交叉引用，发现了1395个光谱匹配。 We made an additional 71 (46 unique) spectroscopic measurements with Y<23 using the HYDRA multi-object spectrograph on the WIYN 3.5m telescope, and 204 spectroscopic measurements from the DEIMOS spectrograph on the Keck II telescope, providing a total of 1441/10,470 spectroscopic redshifts for the EELG sample in COSMOS (~14%).我们确认1418（〜98％）为H $α$或[OIII] $λ$ 5007发射器，在上述红移范围内。我们还使用Wiyn/Hydra和Keck/Deimos拍摄的光谱，在NEP中确定了240个红移H $α$和[OIII] $λ$ 5007发射器。使用G-R-I色彩空间中的宽带选择技术，我们将H $α$和[OIII] $λ$ 5007发射器区分开，精度为98.6％。我们通过构建H $α$和[OIII] $λ$ 5007的光度功能来测试我们的EELG选择，并与最近的文献结果进行比较。我们得出的结论是，HSC，Vera C. Rubin天文台和其他深层光学带调查的宽带大小可直接以直接的方式选择EELG。
We present a search for extreme emission line galaxies (EELGs) at z<1 in the COSMOS and North Ecliptic Pole (NEP) fields with imaging from Subaru/Hyper Suprime-Cam (HSC) and a combination of new and existing spectroscopy. We select EELGs on the basis of substantial excess flux in the z broadband, which is sensitive to H$α$ at 0.3<z<0.42 and [OIII]$λ$5007 at 0.7<z<0.86. We identify 10,470 galaxies with z excesses in the COSMOS dataset and 91,385 in the NEP field. We cross-reference the COSMOS EELG sample with the zCOSMOS and DEIMOS 10k spectral catalogs, finding 1395 spectroscopic matches. We made an additional 71 (46 unique) spectroscopic measurements with Y<23 using the HYDRA multi-object spectrograph on the WIYN 3.5m telescope, and 204 spectroscopic measurements from the DEIMOS spectrograph on the Keck II telescope, providing a total of 1441/10,470 spectroscopic redshifts for the EELG sample in COSMOS (~14%). We confirm that 1418 (~98%) are H$α$ or [OIII]$λ$5007 emitters in the above stated redshift ranges. We also identify 240 redshifted H$α$ and [OIII]$λ$5007 emitters in the NEP using spectra taken with WIYN/HYDRA and Keck/DEIMOS. Using broadband selection techniques in g-r-i color space, we distinguish between H$α$ and [OIII]$λ$5007 emitters with 98.6% accuracy. We test our EELG selection by constructing H$α$ and [OIII]$λ$5007 luminosity functions and comparing to recent literature results. We conclude that broadband magnitudes from HSC, the Vera C. Rubin Observatory, and other deep optical multi-band surveys can be used to select EELGs in a straightforward manner.
