Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field

Y. Ideue, T. Nagao, Y. Taniguchi, Y. Shioya, T. Saito, T. Murayama, S. Sasaki, J. R. Trump, A. M. Koekemoer, H. Aussel, P. Capak, O. Ilbert, H. McCracken, B. Mobasher, M. Salvato, D. B. Sanders, N. Scoville

研究成果: Article査読

27 被引用数 (Scopus)

抄録

We investigate the relation between the star formation activity in galaxies and environment at z ≃ 1.2 in the Cosmic Evolution Survey field, using the fraction of [O II] emitters and the local galaxy density. The fraction of [O II] emitters appears to be almost constant over the surface density of galaxies between 0.2 and 10 Mpc-2. This trend is different from that seen in the local universe where the star formation activity is weaker in higher density regions. To understand this difference between z ∼ 1 and z ∼ 0, we study the fraction of non-isolated galaxies as a function of local galaxy density. We find that the fraction of non-isolated galaxies increases with increasing density. Our results suggest that the star formation in galaxies at z ∼ 1 is triggered by galaxy interaction and/or mergers.

本文言語English
ページ(範囲)971-976
ページ数6
ジャーナルAstrophysical Journal
700
2
DOI
出版ステータスPublished - 2009

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

フィンガープリント

「Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル