TY - JOUR
T1 - The Hα luminosity function and star formation rate at z ≈ 0.24 based on Subaru Deep imaging data
AU - Fujita, Shinobu S.
AU - Ajiki, Masaru
AU - Shioya, Yasuhiro
AU - Nagao, Tohru
AU - Murayama, Takashi
AU - Taniguchi, Yoshiaki
AU - Umeda, Kazuyoshi
AU - Yamada, Sanae
AU - Yagi, Masafumi
AU - Okamura, Sadanori
AU - Komiyama, Yutaka
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2003/4/1
Y1 - 2003/4/1
N2 - We have carried out a deep imaging survey for Hα-emitting galaxies at z ≈ 0.24 using a narrowband filter tuned with the redshifted line. The total sky area covered is 706 arcmin2 within a redshift range from 0.234 to 0.252 (δz = 0.018). This corresponds to a volume of 3.9 × 103 Mpc3 when Ωmatter = 0.3, ΩΛ = 0.7, and H0 = 70 km s-1 Mpc-1 are adopted. We obtain a sample of 348 Hα-emitting galaxies whose observed emission-line equivalent widths are greater than 12 Å. We find an extinction-corrected Hα luminosity density of 1039.65+0.08-0.12 ergs s-1 Mpc-3. Using the Kennicutt relation between the Hα 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⊙ yr-1 Mpc-3. This value is higher by a factor of 3 than the local star formation rate density.
AB - We have carried out a deep imaging survey for Hα-emitting galaxies at z ≈ 0.24 using a narrowband filter tuned with the redshifted line. The total sky area covered is 706 arcmin2 within a redshift range from 0.234 to 0.252 (δz = 0.018). This corresponds to a volume of 3.9 × 103 Mpc3 when Ωmatter = 0.3, ΩΛ = 0.7, and H0 = 70 km s-1 Mpc-1 are adopted. We obtain a sample of 348 Hα-emitting galaxies whose observed emission-line equivalent widths are greater than 12 Å. We find an extinction-corrected Hα luminosity density of 1039.65+0.08-0.12 ergs s-1 Mpc-3. Using the Kennicutt relation between the Hα 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⊙ yr-1 Mpc-3. This value is higher by a factor of 3 than the local star formation rate density.
KW - Galaxies: distances and redshifts
KW - Galaxies: evolution
KW - Galaxies: luminosity function, mass function
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U2 - 10.1086/374859
DO - 10.1086/374859
M3 - Article
AN - SCOPUS:0042090500
VL - 586
SP - L115-L118
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2 II
ER -