paper

Evolution of the H+[OIII] and [OII] luminosity functions and the [OII] star-formation history of the Universe up to ~ 5 from HiZELS

arXiv:1503.00004 · doi:10.1093/mnras/stv1474

Abstract

We investigate the evolution of the H+[OIII] and [OII] luminosity functions from to in four redshift slices per emission line using data from the High-{\it z} Emission Line Survey (HiZELS). This is the first time that the H+[OIII] and [OII] luminosity functions have been studied at these redshifts in a self-consistent analysis. This is also the largest sample of [OII] and H+[OIII] emitters (3475 and 3298 emitters, respectively) in this redshift range, with large co-moving volumes Mpc in two independent volumes (COSMOS and UDS), greatly reducing the effects of cosmic variance. The emitters were selected by a combination of photometric redshift and color-color selections, as well as spectroscopic follow-up, including recent spectroscopic observations using DEIMOS and MOSFIRE on the Keck Telescopes and FMOS on Subaru. We find a strong increase in and a decrease in for both H+[OIII] and [OII] emitters. We derive the [OII] star-formation history of the Universe since and find that the cosmic SFRD rises from to and then drops towards . We also find that our star-formation history is able to reproduce the evolution of the stellar mass density up to based only on a single tracer of star-formation. When comparing the H+[OIII] SFRDs to the [OII] and H SFRD measurements in the literature, we find that there is a remarkable agreement, suggesting that the H+[OIII] sample is dominated by star-forming galaxies at high- rather than AGNs.

24 pages, 14 figures, 7 Tables, MNRAS accepted

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Evolution of the H$β$+[OIII] and [OII] luminosity functions and the [OII] star-formation history of the Universe up to $z$ ~ 5 from HiZELS · wovepaper