The evolution of the [OII], H{\beta} and [OIII] emission-line luminosity functions over the last nine billions years

May 10, 2016
12 pages
Published in:
  • Mon.Not.Roy.Astron.Soc. 461 (2016) 1, 1076-1087
  • Published: Sep 1, 2016
e-Print:

Citations per year

201720192021202320234152
Abstract: (Oxford University Press)
Emission line galaxies are one of the main tracers of the large-scale structure to be targeted by the next-generation dark energy surveys. To provide a better understanding of the properties and statistics of these galaxies, we have collected spectroscopic data from the VVDS and DEEP2 deep surveys and estimated the galaxy luminosity functions (LFs) of three distinct emission lines, [OII](λλ3726,3729)\left[\rm{O\,{\small {II}}}\right]\,(\lambda \lambda 3726,3729) (0.5 < z < 1.3), Hβ (λ4861) (0.3 < z < 0.8) and [OIII](λ5007)\left[\rm{O\,{\small {III}}}\right]\,(\lambda 5007) (0.3 < z < 0.8). Our measurements are based on 35 639 emission line galaxies and cover a volume of ∼10^7 Mpc^3. We present the first measurement of the Hβ LF at these redshifts. We have also compiled LFs from the literature that were based on independent data or covered different redshift ranges, and we fit the entire set over the whole redshift range with analytic Schechter and Saunders models, assuming a natural redshift dependence of the parameters. We find that the characteristic luminosity (L_*) and density (ϕ_*) of all LFs increase with redshift. Using the Schechter model over the redshift ranges considered, we find that, for [OII]\left[\rm{O\,{\small {II}}}\right] emitters, the characteristic luminosity L_*(z = 0.5) = 3.2 × 10^41 erg s^−1 increases by a factor of 2.7 ± 0.2 from z = 0.5 to 1.3; for Hβ emitters L_*(z = 0.3) = 1.3 × 10^41 erg s^−1 increases by a factor of 2.0 ± 0.2 from z = 0.3 to 0.8; and for [OIII]\left[\rm{O\,{\small {III}}}\right] emitters L_*(z = 0.3) = 7.3 × 10^41 erg s^−1 increases by a factor of 3.5 ± 0.4 from z = 0.3 to 0.8.
Note:
  • catalogues
  • surveys
  • galaxies: abundances
  • galaxies: evolution
  • galaxies: general
  • cosmology: observations