The [O II] λ3727 luminosity function and star formation rate at z ≈ 1.2 in the COSMOS 2 square degree field and the Subaru deep field

M. I. Takahashi, Y. Shioya, Y. Taniguchi, T. Murayama, M. Ajiki, S. S. Sasaki, O. Koizumi, T. Nagao, N. Z. Scoville, B. Mobasher, H. Aussel, P. Capak, C. Carilli, R. S. Ellis, B. Garilli, M. Giavalisco, L. Guzzo, G. Hasinger, C. Impey, M. G. KitzbichlerA. Koekemoer, O. Le Fèvre, S. J. Lilly, D. Maccagni, A. Renzini, M. Rich, D. B. Sanders, E. Schinnerer, M. Scodeggio, P. Shopbell, V. Smolčić, S. Tribiano, Y. Ideue, S. Mihara

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


We have carried out a wide-field imaging survey for [O II] λ3727 emitting galaxies at z ≈ 1.2 in the HST COSMOS 2 square degree field using the Suprime-Cam on the Subaru Telescope. The survey covers a sky area of 6700 arcmin 2 in the COSMOS field, and a redshift range between 1.17 and 1.20 (Δz = 0.03), corresponding to a survey volume of 5.56 × 10 5 Mpc 3. We obtain a sample of 3176 [O II] emitting galaxies with observed emission-line equivalent widths greater than 26 Å. Since our survey tends to sample brighter [O II] emitting galaxies, we also analyze a sample of fainter [O II] emitting galaxies found in the Subaru Deep Field (SDF). We find an extinction-corrected [O II] luminosity density of 10 40.35-0.06+0.08 ergs s -1 Mpc -3, corresponding to star formation rate density of 0.32 -0.04 +0.06 M yr -1 Mpc -3 in the COSMOS field at z ≈ 1.2. This is the largest survey for [O II] emitters beyond z = 1 currently available.

Original languageEnglish (US)
Pages (from-to)456-467
Number of pages12
JournalAstrophysical Journal, Supplement Series
Issue number1
StatePublished - 2007


  • 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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  • [OII] emitting galaxies in COSMOS & SDF fields

    Takahashi, M. I. (Creator), Shioya, Y. (Creator), Taniguchi, Y. (Creator), Murayama, T. (Creator), Ajiki, M. (Creator), Sasaki, S. S. (Creator), Koizumi, O. (Creator), Nagao, T. (Creator), Scoville, N. Z. (Creator), Mobasher, B. (Creator), Aussel, H. (Creator), Capak, P. (Creator), Carilli, C. (Creator), Ellis, R. S. (Creator), Garilli, B. (Creator), Giavalisco, M. (Creator), Guzzo, L. (Creator), Hasinger, G. (Creator), Impey, C. D. (Creator), Kitzbichler, M. G. (Creator), Koekemoer, A. (Creator), Le Fèvre, F. O. (Contributor), Lilly, S. J. (Creator), Maccagni, D. (Creator), Renzini, A. (Creator), Rich, M. (Creator), Sanders, D. B. (Creator), Schinnerer, E. (Creator), Scodeggio, M. (Creator), Shopbell, P. (Creator), Smolčić, V. (Contributor), Tribiano, S. (Creator), Ideue, Y. (Creator), Mihara, S. (Creator), Capak, P. (Creator), Carilli, C. (Creator), Guzzo, L. (Creator), Le Fevre, O. (Creator), Sanders, D. B. (Creator), Schinnerer, E. (Creator) & Scodeggio, M. (Creator), Centre de Donnees Strasbourg (CDS), 2008


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