Revisiting the Color-Color Selection: Submillimeter and AGN Properties of NUV-r-J Selected Quiescent Galaxies

Yu-Hsuan Hwang, Wei-Hao Wang*, Yu-Yen Chang, Chen-Fatt Lim, Chian-Chou Chen, Zhen-Kai Gao, James S. Dunlop, Yu Gao, Luis C. Ho, Ho Seong Hwang, Maciej Koprowski, Michał J. Michałowski, Ying-jie Peng, Hyunjin Shim, James M. Simpson, Yoshiki Toba

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We examine the robustness of the color–color selection of quiescent galaxies (QGs) against contamination of dusty star-forming galaxies using the latest submillimeter data. We selected 18,304 QG candidates out to z ~ 3 using the commonly adopted NUV–r–J selection based on the high-quality multiwavelength COSMOS2015 catalog. Using extremely deep 450 and 850 μm catalogs from the latest JCMT SCUBA-2 Large Programs, S2COSMOS and STUDIES, as well as the Atacama Large Millimeter/submillimeter Array submillimeter, VLA 3 GHz, and Spitzer MIPS 24 μm catalogs, we identified luminous, dusty, star-forming galaxies among the QG candidates. We also conducted stacking analyses in the SCUBA-2 450 and 850 μm images to look for less-luminous dusty galaxies among the QG candidates. By cross matching to the 24 μm and 3 GHz data, we were able to identify a subgroup of "IR-radio-bright" QGs that possess strong 450 and 850 μm stacking signals. The potential contamination of these luminous and less-luminous dusty galaxies accounts for approximately 10% of the color-selected QG candidates. In addition, there exists a spatial correlation between the luminous star-forming galaxies and the QGs at a lesssim60 kpc scale. Finally, we found a high QG fraction among radio active galactic nuclei (AGNs) at z < 1.5. Our data show a strong correlation between QGs and radio AGNs, which may suggest a connection between the quenching process and the radio-mode AGN feedback.
Original languageEnglish
Article number6
Pages (from-to)1-19
Number of pages19
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 18 May 2021

Keywords / Materials (for Non-textual outputs)

  • astro-ph.GA


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