A.A. Khostovan
Evolution of the H β + [O III] and [O II] luminosity functions and the [O II] star formation history of the Universe up to z ∼ 5 from HiZELS
Khostovan, A.A.; Sobral, D.; Mobasher, B.; Best, P.N.; Smail, I.; Stott, J.P.; Hemmati, S.; Nayyeri, H.
Authors
D. Sobral
B. Mobasher
P.N. Best
Ian Smail ian.smail@durham.ac.uk
Emeritus Professor
J.P. Stott
S. Hemmati
H. Nayyeri
Abstract
We investigate the evolution of the H β + [O iii] and [O ii] luminosity functions from z ∼ 0.8 to ∼5 in four redshift slices per emission line using data from the High-z Emission Line Survey (HiZELS). This is the first time that the H β + [O iii] and [O ii] luminosity functions have been studied at these redshifts in a self-consistent analysis. This is also the largest sample of [O ii] and H β + [O iii] emitters (3475 and 3298 emitters, respectively) in this redshift range, with large comoving volumes ∼1 × 106 Mpc−3 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 colour–colour 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 L⋆ and a decrease in ϕ⋆ for both H β + [O iii] and [O ii] emitters. We derive the [O ii] star formation history of the Universe since z ∼ 5 and find that the cosmic star formation rate density (SFRD) rises from z ∼ 5 to ∼3 and then drops towards z ∼ 0. We also find that our star formation history is able to reproduce the evolution of the stellar mass density up to z ∼ 5 based only on a single tracer of star formation. When comparing the H β + [O iii] SFRDs to the [O ii] and H α SFRD measurements in the literature, we find that there is a remarkable agreement, suggesting that the H β + [O iii] sample is dominated by star-forming galaxies at high-z rather than AGNs.
Citation
Khostovan, A., Sobral, D., Mobasher, B., Best, P., Smail, I., Stott, J., …Nayyeri, H. (2015). Evolution of the H β + [O III] and [O II] luminosity functions and the [O II] star formation history of the Universe up to z ∼ 5 from HiZELS. Monthly Notices of the Royal Astronomical Society, 452(4), 3948-3968. https://doi.org/10.1093/mnras/stv1474
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 1, 2015 |
Publication Date | Oct 1, 2015 |
Deposit Date | Feb 16, 2016 |
Publicly Available Date | Feb 19, 2016 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 452 |
Issue | 4 |
Pages | 3948-3968 |
DOI | https://doi.org/10.1093/mnras/stv1474 |
Keywords | Galaxies: evolution, Galaxies: high-redshift, Galaxies: luminosity function, mass function, Cosmology: observations |
Public URL | https://durham-repository.worktribe.com/output/1419495 |
Related Public URLs | http://adsabs.harvard.edu/abs/2015MNRAS.452.3948K |
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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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