The Dependence of Galaxy Clustering on Stellar-mass Assembly History for LRGs
We analyze the spectra of 300,000 luminous red galaxies (LRGs) with stellar massesM(*) greater than or similar to 1011M. from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS). By studying their star formation histories, we find two main evolutionary paths converging into the same quiescent galaxy population at z similar to 0.55. Fast-growing LRGs assemble 80% of their stellar mass very early on (z similar to 5), whereas slow-growing LRGs reach the same evolutionary state at z similar to 1.5. Further investigation reveals that their clustering properties on scales of similar to 1-30 Mpc are, at a high level of significance, also different. Fast-growing LRGs are found to be more strongly clustered and reside in overall denser large-scale structure environments than slow-growing systems, for a given stellar-mass threshold. Our results show a dependence of clustering on a property that is directly related to the evolution of galaxies, i. e., the stellar-mass assembly history, for a homogeneous population of similar mass and color. In a forthcoming work, we will address the halo connection in the context of galaxy assembly bias.
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|ID WOS:000412300900002 Not found in local WOS DB
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|ASTROPHYSICAL JOURNAL LETTERS
|IOP PUBLISHING LTD
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