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25 April 2024

» arxiv » 1507.4356

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Clustering properties of $g$-selected galaxies at $zsim0.8$
Ginevra Favole ; Johan Comparat ; Francisco Prada ; Gustavo Yepes ; Eric Jullo ; Anna Niemiec ; Jean-Paul Kneib ; Sergio A. Rodríguez-Torres ; Anatoly Klypin ; Ramin A. Skibba ; Cameron K. McBride ; Daniel J. Eisenstein ; David J. Schlegel ; Sebastián E. Nuza ; Chia-Hsun Chuang ; Timothée Delubac ; Christophe Yèche ; Donald P. Schneider ;
Date:	15 Jul 2015
Abstract:	Current 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 (ELG) 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 onto 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 $zsim0.8$ live in halos of $(1pm 0.5) imes10^{12},h^{-1}$M$_{odot}$ and 22.5$pm2.5$% 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.
Source:	arXiv, 1507.4356
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