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- W3100967345 abstract "Previous work has demonstrated that at a given stellar mass, quiescent galaxies are more strongly clustered than star-forming galaxies. The contribution to this signal from central, as opposed to satellite, galaxies is not known, which has strong implications for galaxy evolution models. To investigate the contribution from central galaxies, here we present measurements of the clustering of isolated primary (IP) galaxies, used as a proxy for central galaxies, at 0.2 < z < 0.9 with data from the PRIsm MUlti-Object Survey (PRIMUS) galaxy redshift survey. Using a sample of spectroscopic redshifts for ∼60,000 galaxies with covering 5 deg2 on the sky, we define IP galaxies using isolation cuts in spatial proximity and stellar mass of nearby galaxies. We find that at a fixed stellar mass, quiescent IP galaxies are more strongly clustered than star-forming IP galaxies at z ∼ 0.35 (10σ). Using mock galaxy catalogs based on the recent halo occupation models of Behroozi et al. and designed to replicate the parameters of the PRIMUS survey data set, we find that these clustering differences are due in part to quiescent central galaxies being more strongly clustered than star-forming central galaxies. This is consistent with either distinct stellar-to-halo mass relations for quiescent and star-forming central galaxies, and/or central galaxy assembly bias. We additionally use mock catalogs to assess the dependence of both incompleteness and satellite galaxy contamination in the IP galaxy samples on redshift, galaxy type, and stellar mass, and demonstrate how isolation criteria yield biased subsamples of central galaxies via environmental incompleteness, or the preferential exclusion of central galaxies in overdense environments." @default.
- W3100967345 created "2020-11-23" @default.
- W3100967345 creator A5033558209 @default.
- W3100967345 creator A5034370718 @default.
- W3100967345 creator A5063587809 @default.
- W3100967345 creator A5085992419 @default.
- W3100967345 date "2019-10-14" @default.
- W3100967345 modified "2023-09-24" @default.
- W3100967345 title "PRIMUS: Clustering of Star-forming and Quiescent Central Galaxies at 0.2 < <i>z</i> < 0.9" @default.
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- W3100967345 doi "https://doi.org/10.3847/1538-4357/ab3b5d" @default.
- W3100967345 hasPublicationYear "2019" @default.
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