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 masses M ≳ 10M 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 ∼ 0.5...
| Autores: | , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/380023 |
| Acceso en línea: | http://hdl.handle.net/10261/380023 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies: evolution Galaxies: formation Galaxies: halos Large-scale structure of universe Methods: numerical Surveys |
| Sumario: | We analyze the spectra of 300,000 luminous red galaxies (LRGs) with stellar masses M ≳ 10M 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 ∼ 0.55. Fast-growing LRGs assemble 80% of their stellar mass very early on (z ∼ 5), whereas slow-growing LRGs reach the same evolutionary state at z ∼ 1.5. Further investigation reveals that their clustering properties on scales of ∼ 1-30Mpc 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. © 2017. The American Astronomical Society |
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