Quenching of Star-formation Activity of High-redshift Galaxies in Clusters and Field. Issue Volume 11:Issue S319(2015) (17th August 2016)

• Record Type: Journal Article
• Authors: Lee, Seong-Kook; Im, Myungshin; Kim, Jae-Woo; Lotz, Jennifer; McPartland, Conor; Peth, Michael; Koekemoer, Anton
• Editors: Kaviraj, S.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 11:Issue S319(2015)
• Page Start: 28
• Page End: 28
• Publication Date: 2016-08-17
• Subjects: galaxies: clusters: general, -- galaxies: high-redshift, -- galaxies: evolution; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S174392131501011X
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: At local, galaxy properties are well known to be clearly different in different environments. However, it is still an open question how this environment-dependent trend has been shaped. We present the results of our investigation about the evolution of star-formation properties of galaxies over a wide redshift range, from z ~ 2 to z ~ 0.5, focusing its dependence on their stellar mass and environment (Lee et al .2015 ). In the UKIDSS/UDS region, covering ~2800 square arcmin, we estimated photometric redshifts and stellar population properties, such as stellar masses and star-formation rates, using the deep optical and near-infrared data available in this field. Then, we identified galaxy cluster candidates within the given redshift range. Through the analysis and comparison of star-formation (SF) properties of galaxies in clusters and in field, we found interesting results regarding the evolution of SF properties of galaxies: (1) regardless of redshifts, stellar mass is a key parameter controlling quenching of star formation in galaxies; (2) At z < 1, environmental effects become important at quenching star formation regardless of stellar mass of galaxies; and (3) However, the result of the environmental quenching is prominent only for low mass galaxies (M* < 10 10 M⊙ ) since the star formation in most of high mass galaxies are already quenched at z > 1.