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Title:
Clustering Properties of Low-Luminosity Star-Forming Galaxies at z = 0.24 and 0.40 in the Subaru Deep Field
Authors:
Nakajima, Aki; Shioya, Yasuhiro; Nagao, Tohru; Saito, Tomoki; Murayam, Takashi; Sasaki, Shunji S.; Yokouchi, Asuka; Taniguchi, Yoshiaki
Affiliation:
AA(Graduate School of Science and Engineering, Ehime University, Bunkyo-cho, Matsuyama 790-8577; ) AB(Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho, Matsuyama 790-8577; ) AC(Graduate School of Science and Engineering, Ehime University, Bunkyo-cho, Matsuyama 790-8577; Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho, Matsuyama 790-8577) AD(Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho, Matsuyama 790-8577) AE(Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578) AF(Graduate School of Science and Engineering, Ehime University, Bunkyo-cho, Matsuyama 790-8577; Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578) AG(Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578) AH(Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho, Matsuyama 790-8577)
Publication:
Publications of the Astronomical Society of Japan, Vol.60, No.6, pp.1249--1255 (PASJ Homepage)
Publication Date:
12/2008
Origin:
PASJ
Keywords:
galaxies: distances and redshifts, galaxies: evolution, cosmology: large-scale structure of universe
Bibliographic Code:
2008PASJ...60.1249N

Abstract

We present our analysis on the clustering properties of star-forming galaxies selected by narrow-band excesses in the Subaru Deep Field. Specifically, we focus on Hα emitting galaxies at z = 0.24 and z = 0.40 in the same field, to investigate possible evolutionary signatures of clustering properties of star-forming galaxies. Based on an analysis on 228 Hα emitting galaxies with 39.8 < log L(Hα) < 40.8 at z = 0.40, we find that their two-point correlation function can be estimated as ξ = (r / 1.62+0.64‑0.50 Mpc)‑1.84±0.08. This is similar to that of Hα emitting galaxies in the same Hα luminosity range at z = 0.24, ξ = (r / 1.88+0.60‑0.49 Mpc)‑1.89±0.07. These correlation lengths are smaller than those for a brighter galaxy sample studied by Meneux et al. (2006) in the same redshift range. The evolution of the correlation length between z = 0.24 and z = 0.40 is interpreted by the gravitational growth of the dark-matter halos.
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