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The host dark matter haloes of [O II] emitters at 0.5 < z < 1.5.

Gonzalez-Perez, V. and Comparat, J. and Norberg, P. and Baugh, C. M. and Contreras, S. and Lacey, C. and McCullagh, N. and Orsi, A. and Helly, J. and Humphries, J. (2018) 'The host dark matter haloes of [O II] emitters at 0.5 < z < 1.5.', Monthly notices of the Royal Astronomical Society., 474 (3). pp. 4024-4038.

Abstract

Emission line galaxies (ELGs) are used in several ongoing and upcoming surveys (SDSSIV/eBOSS, DESI) as tracers of the dark matter distribution. Using a new galaxy formation model, we explore the characteristics of [O II] emitters, which dominate optical ELG selections at z 1. Model [O II] emitters at 0.5 < z < 1.5 are selected to mimic the DEEP2, VVDS, eBOSS and DESI surveys. The luminosity functions of model [O II] emitters are in reasonable agreement with observations. The selected [O II] emitters are hosted by haloes with Mhalo ≥ 1010.3h−1M, with ∼90 per cent of them being central star-forming galaxies. The predicted mean halo occupation distributions of [O II] emitters have a shape typical of that inferred for star-forming galaxies, with the contribution from central galaxies, N[O II] cen, being far from the canonical step function. The N[O II] cen can be described as the sum of an asymmetric Gaussian for discs and a step function for spheroids, which plateau below unity. The model [O II] emitters have a clustering bias close to unity, which is below the expectations for eBOSS and DESI ELGs. At z ∼ 1, a comparison with observed g-band-selected galaxy, which is expected to be dominated by [O II] emitters, indicates that our model produces too few [O II] emitters that are satellite galaxies. This suggests the need to revise our modelling of hot gas stripping in satellite galaxies.

Item Type:Article
Additional Information:Erratum: V Gonzalez-Perez, J Comparat, P Norberg, C M Baugh, S Contreras, C Lacey, N McCullagh, A Orsi, J Helly, J Humphries, Erratum: The host dark matter haloes of [O II] emitters at 0.5 < z < 1.5, Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 1, May 2021, Pages 28–30, https://doi-org.ezphost.dur.ac.uk/10.1093/mnras/stab340
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1093/mnras/stx2807
Publisher statement:This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date accepted:26 October 2017
Date deposited:16 January 2018
Date of first online publication:30 October 2017
Date first made open access:16 January 2018

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