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Title

Clustering properties of g-selected galaxies at z ~ 0.8

AuthorsFavole, Ginevra; Comparat, Johan; Prada, Francisco ; Schneider, D.P.
KeywordsGalaxies: statistics
Galaxies: haloes
Galaxies: distances and redshifts
Theory - large-scale structure of Universe
Cosmology: observations - cosmology
Issue Date2016
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 461: 3421- 3431 (2016)
AbstractCurrent and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELGs) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range 0.6 < z < 1.7. With current data, we explore the halo-galaxy connection by measuring three clustering properties of g-selected ELGs as matter tracers in the redshift range 0.6 < z < 1: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them on to the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub)Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at z ~ 0.8 live in haloes of (1 ± 0.5) × 10 hM⊙ and 22.5 ± 2.5 per cent of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio. © 2016 The Authors.
URIhttp://hdl.handle.net/10261/150345
DOI10.1093/mnras/stw1483
Identifiersdoi: 10.1093/mnras/stw1483
issn: 1365-2966
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