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2010MNRAS.405.2419G - Mon. Not. R. Astron. Soc., 405, 2419-2438 (2010/July-2)
The redshift one LDSS-3 emission line survey (ROLES): survey method and z ∼ 1 mass-dependent star formation rate density.
GILBANK D.G., BALOGH M.L., GLAZEBROOK K., BOWER R.G., BALDRY I.K., DAVIES G.T., HAU G.K.T., LI I.H. and McCARTHY P.
Abstract (from CDS):
Using the [Oii]λ3727 emission line, we obtain redshifts and star formation rates (SFRs) for star-forming galaxies down to a limit of ∼0.3M☉/yr. We present the [Oii] luminosity function measured in ROLES and find a faint-end slope of αfaint∼ -1.5, similar to that measured at z ∼ 0.1 in the Sloan Digital Sky Survey. By combining ROLES with higher mass surveys (Gemini Deep Deep Survey and European Southern Observatory GOOD-S public spectroscopy) we measure the SFRD as a function of stellar mass using [Oii] (with and without various empirical corrections) and using spectral energy distribution fitting to obtain the SFR from the rest-frame UV luminosity for galaxies with spectroscopic redshifts. Our best estimate of the corrected [Oii] SFRD and UV SFRD both independently show that the SFRD evolves equally for galaxies of all masses between z ∼ 1 and z ∼ 0.1. The exact evolution in normalization depends on the indicator used, with the [Oii]-based estimate showing a change of a factor of ~2.6 and the UV-based estimate a factor of ~6. We discuss possible reasons for the discrepancy in normalization between the indicators, but note that the magnitude of this uncertainty is comparable to the discrepancy between indicators seen in other z ∼ 1 works. Our result that the shape of the SFRD as a function of stellar mass (and hence the mass range of galaxies dominating the SFRD) does not evolve between z ∼ 1 and z ∼ 0.1 is robust to the choice of indicator.
Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS
Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: general
Simbad objects: 5
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