The Hα luminosity function and star formation rate at z ≈ 0.24 based on Subaru deep imaging data

被引：78

作者：

Fujita, SS ^{[1
]}

Ajiki, M

Shioya, Y

Nagao, T

Murayama, T

Taniguchi, Y

Umeda, K

Yamada, S

Yagi, M

Okamura, S

Komiyama, Y

机构：

[1] Tohoku Univ, Astron Inst, Grad Sch Sci, Aoba Ku, Sendai, Miyagi 9808578, Japan

[2] Natl Astron Observ, Tokyo 1818588, Japan

[3] Univ Tokyo, Dept Astron, Grad Sch Sci, Tokyo 1130033, Japan

[4] Univ Tokyo, Res Ctr Early Universe, Sch Sci, Tokyo 1130033, Japan

[5] Natl Astron Observ, Subaru Telescope, Hilo, HI 96720 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 586卷 / 02期

关键词：

galaxies : distances and redshifts; galaxies : evolution; galaxies : luminosity function; mass function;

D O I：

10.1086/374859

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have carried out a deep imaging survey for Halpha-emitting galaxies at z approximate to 0.24 using a narrowband filter tuned with the redshifted line. The total sky area covered is 706 arcmin(2) within a redshift range from 0.234 to 0.252 (deltaz = 0.018). This corresponds to a volume of 3.9 x 10(3) Mpc(3) when Omega(matter) = 0.3, Omega(A) = 0.7, and H-0 = 70 km s(-1) Mpc(-1) are adopted. We obtain a sample of 348 Halpha-emitting galaxies whose observed emission-line 10(-0.12)(39.65+0.08) ergs s(-1) Mpc(-3). Using the Kennicutt relation between the Halpha luminosity and the star formation rate, the star formation rate density in the covered volume is estimated to be 0.036(-0.012)(+0.006) M-circle dot yr(-1) Mpc(-3). This value is higher by a factor of 3 than the local star formation rate density.

引用

页码：L115 / L118

页数：4

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