https://scholars.lib.ntu.edu.tw/handle/123456789/624913
標題: | The properties of radio and mid-infrared detected galaxies and the effect of environment on the co-evolution of AGN and star formation at z ∼1 | 作者: | Shen L Lemaux B.C Lubin L.M Mckean J Miller N.A Pelliccia D Fassnacht C.D Tomczak A PO-FENG WU Kocevski D Gal R Hung D Squires G. |
關鍵字: | galaxies: Active; galaxies: Clusters: General; galaxies: Evolution; galaxies: Star formation; infrared: Galaxies; radio continuum: Galaxies | 公開日期: | 2020 | 卷: | 494 | 期: | 4 | 起(迄)頁: | 5374-5395 | 來源出版物: | Monthly Notices of the Royal Astronomical Society | 摘要: | In this study, we investigate 179 radio-infrared (IR) galaxies drawn from a sample of spectroscopically confirmed galaxies, which are detected in radio and mid-IR (MIR) in the redshift range of 0.55 ≤ z ≤ 1.30 in the Observations of Redshift Evolution in Large Scale Environments (ORELSE) survey. We constrain the active galactic nuclei (AGN) contribution to the total IR luminosity (fAGN), and estimate the AGN luminosity (LAGN) and the star formation rate (SFR). Based on the fAGN and radio luminosity, radio-IR galaxies are split into galaxies that host either high- or low-fAGN AGN (high-/low-fAGN), and star-forming galaxies (SFGs) with little to no AGN activity. We study the properties of the three radio-IR sub-samples comparing to an underlying parent sample. In the comparison of radio luminosity of three sub-samples, no significant difference was found, which could be due to the combined contribution of radio emission from AGN and star formation. We find a positive relationship between LAGN and specific SFR (sSFR) for both AGN sub-samples, strongly suggesting a co-evolution scenario of AGN and SF in these galaxies. A toy model is designed to demonstrate this co-evolution scenario, where we find that, in almost all cases, a rapid quenching time-scale is required, which we argue is a signature of AGN quenching. The environmental preference for intermediate/infall regions of clusters/groups remains across the co-evolution scenario, which suggests that galaxies might be in an orbital motion around the cluster/group during the scenario. © 2020 The Author(s). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095281506&doi=10.1093%2fmnras%2fstaa1005&partnerID=40&md5=6b3f628d376fe792f08df56cf4e7181e https://scholars.lib.ntu.edu.tw/handle/123456789/624913 |
ISSN: | 00358711 | DOI: | 10.1093/mnras/staa1005 | SDG/關鍵字: | Luminance; Quenching; Red Shift; Stars; Active galactic nuclei; Co-evolution; Galactic stars; Galaxies active; Galaxies: clusters: General; Galaxies: star formation; Galaxy evolution; Infrared galaxies; Radio continuum: galaxies; Sub-samples; Galaxies |
顯示於: | 天文物理研究所 |
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