Mufasa: The assembly of the red sequence
dc.contributor.author | Dave, Romeel | |
dc.contributor.author | Rafieferantso, Mika H. | |
dc.contributor.author | Thompson, Robert J. | |
dc.date.accessioned | 2017-04-22T10:01:54Z | |
dc.date.available | 2017-04-22T10:01:54Z | |
dc.date.issued | 2017 | |
dc.description.abstract | We examine the growth and evolution of quenched galaxies in the Mufasa cosmo- logical hydrodynamic simulations that include an evolving halo mass-based quench- ing prescription, with galaxy colours computed accounting for line-of-sight extinc- tion to individual star particles. Mufasa reproduces the observed present-day red sequence quite well, including its slope, amplitude, and scatter. In Mufasa, the red sequence slope is driven entirely by the steep stellar mass{stellar metallicity relation, which independently agrees with observations. High-mass star-forming galaxies blend smoothly onto the red sequence, indicating the lack of a well-de ned green valley at M & 1010:5M . The most massive galaxies quench the earliest and then grow very little in mass via dry merging; they attain their high masses at earlier epochs when cold in ows more e ectively penetrate hot halos. To higher redshifts, the red sequence becomes increasingly contaminated with massive dusty star-forming galaxies; UVJ selection subtly but e ectively separates these populations. We then examine the evo- lution of the mass functions of central and satellite galaxies split into passive and star-forming via UVJ. Massive quenched systems show good agreement with obser- vations out to z 2, despite not including a rapid early quenching mode associated with mergers. However, low-mass quenched galaxies are far too numerous at z . 1 in Mufasa, indicating that Mufasa strongly over-quenches satellites. A challenge for hydrodynamic simulations is to devise a quenching model that produces enough early massive quenched galaxies and keeps them quenched to z = 0, while not being so strong as to over-quench satellites; Mufasa only succeeds at the former. | en_US |
dc.description.accreditation | ISI | en_US |
dc.identifier.citation | Davé, R. et al. (2017). Mufasa: The assembly of the red sequence. Monthly Notices of the Royal Astronomical Society. | en_US |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/10566/2747 | |
dc.identifier.uri | https://arxiv.org/abs/1704.01135 | |
dc.language.iso | en | en_US |
dc.privacy.showsubmitter | FALSE | |
dc.publisher | Oxford University Press | en_US |
dc.rights | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. In accordance with author self-archiving policy, to view the article online visit: https://arxiv.org/abs/1704.01135 | |
dc.status.ispeerreviewed | TRUE | |
dc.subject | Galaxies | en_US |
dc.subject | Formation | en_US |
dc.subject | Evolution | en_US |
dc.subject | N-body simulations | en_US |
dc.title | Mufasa: The assembly of the red sequence | en_US |
dc.type | Article | en_US |
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