Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-25T23:53:05.321Z Has data issue: false hasContentIssue false

Quenching of Star-formation Activity of High-redshift Galaxies in Clusters and Field

Published online by Cambridge University Press:  17 August 2016

Seong-Kook Lee
Affiliation:
CEOU/Department of Physics and Astronomy, Seoul National University, Korea, email: [email protected]
Myungshin Im
Affiliation:
CEOU/Department of Physics and Astronomy, Seoul National University, Korea, email: [email protected]
Jae-Woo Kim
Affiliation:
CEOU/Department of Physics and Astronomy, Seoul National University, Korea, email: [email protected]
Jennifer Lotz
Affiliation:
STScI, Baltimore, USA
Conor McPartland
Affiliation:
IfA, University of Hawaii, Honolulu, USA
Michael Peth
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, USA
Anton Koekemoer
Affiliation:
STScI, Baltimore, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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* < 1010 M) since the star formation in most of high mass galaxies are already quenched at z > 1.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

Lee, S.-K., Im, M., Kim, J.-W., Lotz, J., McPartland, C., Peth, M., & Koekemoer, A. 2015, ApJ, 810, 90 Google Scholar