In this paper we present a simple color-magnitude selection and obtain a large sample of 33,893 massive quiescent galaxies at intermediate redshifts (1<z<1.5). We choose the longest wavelength available in the Hyper-Supreme-Cam (HSC) deep survey, the Y band and i-Y color, to select the 4000A Balmer jump in passive galaxies to the highest redshift possible within the survey. With the rich multi-wavelength data in the HSC deep fields, we then confirm that the selected galaxies are in the targeted redshift range of 1<z<1.5, lie in the passive region of the UVJ diagram, and have high stellar masses at log(M*/M_sun)>10.5, with a median of log(M*/M_sun)=11.0. A small fraction of our galaxies is also covered by the HST CANDELS. Morphological analysis in the observed H band shows that the majority of this subsample are early-type galaxies. As massive early-type galaxies trace the high density regions in the large scale structure in the universe, our study provides a quick and simple way to obtain a statistical significant sample of massive galaxies in a relative narrow redshift range. Our sample is 7-20 times larger at the massive end (log(M*/M_sun)>10.5) than any existing samples obtained in previous surveys. This is a pioneer study, and the technique introduced here can be applied to future wide-field survey to study large scale structure, and to identify high density region and clusters.
@article{arxiv.2010.10941,
title = {A Large Massive Quiescent Galaxy Sample at z~1.2},
author = {Hai Xu and Y. Sophia Dai and Jia-Sheng Huang and Zhaoyu Wang and Cheng Cheng and Xu Shao and Shumei Wu and Xiaohu Yang and Yipeng Jing and Marcin Sawicki and Feng-Yuan Liu},
journal= {arXiv preprint arXiv:2010.10941},
year = {2020}
}
Comments
16 pages, 16 figures, accepted for publication in ApJ