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

Shinobu S. Fujita; Masaru Ajiki; Yasuhiro Shioya; Tohru Nagao; Takashi Murayama; Yoshiaki Taniguchi; Kazuyoshi Umeda; Sanae Yamada; Masafumi Yagi; Sadanori Okamura; Yutaka Komiyama

doi:10.1086/374859

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

Shinobu S. Fujita, Masaru Ajiki, Yasuhiro Shioya, Tohru Nagao, Takashi Murayama, Yoshiaki Taniguchi, Kazuyoshi Umeda, Sanae Yamada, Masafumi Yagi, Sadanori Okamura, Yutaka Komiyama

SCI - Astronomy

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

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 Ω_matter = 0.3, Ω_Λ = 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 10^{39.65+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.

Original language	English
Pages (from-to)	L115-L118
Journal	Astrophysical Journal
Volume	586
Issue number	2 II
DOIs	https://doi.org/10.1086/374859
Publication status	Published - 2003 Apr 1

Keywords

Galaxies: distances and redshifts
Galaxies: evolution
Galaxies: luminosity function, mass function

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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The Hα luminosity function and star formation rate at z ≈ 0.24 based on Subaru Deep imaging data. / Fujita, Shinobu S.; Ajiki, Masaru; Shioya, Yasuhiro; Nagao, Tohru; Murayama, Takashi; Taniguchi, Yoshiaki; Umeda, Kazuyoshi; Yamada, Sanae; Yagi, Masafumi; Okamura, Sadanori; Komiyama, Yutaka.

In: Astrophysical Journal, Vol. 586, No. 2 II, 01.04.2003, p. L115-L118.

Research output: Contribution to journal › Article › peer-review

Fujita, Shinobu S. ; Ajiki, Masaru ; Shioya, Yasuhiro ; Nagao, Tohru ; Murayama, Takashi ; Taniguchi, Yoshiaki ; Umeda, Kazuyoshi ; Yamada, Sanae ; Yagi, Masafumi ; Okamura, Sadanori ; Komiyama, Yutaka. / The Hα luminosity function and star formation rate at z ≈ 0.24 based on Subaru Deep imaging data. In: Astrophysical Journal. 2003 ; Vol. 586, No. 2 II. pp. L115-L118.

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abstract = "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 {\AA}. 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.",

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AU - Fujita, Shinobu S.

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AU - Nagao, Tohru

AU - Murayama, Takashi

AU - Taniguchi, Yoshiaki

AU - Umeda, Kazuyoshi

AU - Yamada, Sanae

AU - Yagi, Masafumi

AU - Okamura, Sadanori

AU - Komiyama, Yutaka

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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.

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