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 - Funding Information:
invaluable help. We thank the referee, Jesus Gallego, for his detailed comments that improved this article. We also thank T. Hayashino for his invaluable help. This work was financially supported in part by the Ministry of Education, Culture, Sports, Science, and Technology (10044052 and 10304013).
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
UR - http://www.scopus.com/inward/record.url?scp=0042090500&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042090500&partnerID=8YFLogxK
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 -