dc.contributor.author | Martin, G. | |
dc.contributor.author | Kaviraj, S. | |
dc.contributor.author | Devriendt, J.E.G. | |
dc.contributor.author | Dubois, Y. | |
dc.contributor.author | Pichon, C. | |
dc.contributor.author | Laigle, C. | |
dc.date.accessioned | 2018-09-12T00:12:28Z | |
dc.date.available | 2018-09-12T00:12:28Z | |
dc.date.issued | 2018-03-01 | |
dc.identifier.citation | Martin , G , Kaviraj , S , Devriendt , J E G , Dubois , Y , Pichon , C & Laigle , C 2018 , ' Identifying the progenitors of present-day early-type galaxies in observational surveys: correcting `progenitor bias' using the Horizon-AGN simulation ' , Monthly Notices of the Royal Astronomical Society , vol. 474 , no. 3 , pp. 3140–3151 . https://doi.org/10.1093/mnras/stx3057 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1711.06694v1 | |
dc.identifier.other | ORCID: /0000-0002-5601-575X/work/77850226 | |
dc.identifier.uri | http://hdl.handle.net/2299/20558 | |
dc.description | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |
dc.description.abstract | As endpoints of the hierarchical mass-assembly process, the stellar populations of local earlytype galaxies encode the assembly history of galaxies over cosmic time. We useHorizon-AGN, a cosmological hydrodynamical simulation, to study the merger histories of local early-type galaxies and track how the morphological mix of their progenitors evolves over time. We provide a framework for alleviating 'progenitor bias' - the bias that occurs if one uses only early-type galaxies to study the progenitor population. Early types attain their final morphology at relatively early epochs - by z ~ 1, around 60 per cent of today's early types have had their last significant merger. At all redshifts, the majority of mergers have one late-type progenitor, with late-late mergers dominating at z > 1.5 and early-early mergers becoming significant only at z < 0.5. Progenitor bias is severe at all but the lowest redshifts - e.g. at z~0.6, less than 50 per cent of the stellar mass in today's early types is actually in progenitors with early-type morphology, while, at z~ 2, studying only early types misses almost all (80 per cent) of the stellar mass that eventually ends up in local early-type systems. At high redshift, almost all massive late-type galaxies, regardless of their local environment or star formation rate, are progenitors of local early-type galaxies, as are lowermass (M* < 10 10.5 M ⊙) late-types as long as they reside in high-density environments. In this new era of large observational surveys (e.g. LSST, JWST), this study provides a framework for studying how today's early-type galaxies have been built up over cosmic time. | en |
dc.format.extent | 12 | |
dc.format.extent | 530357 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Galaxies: evolution | |
dc.subject | Galaxies: formation | |
dc.subject | Galaxies: highredshift | |
dc.subject | Galaxies: statistics | |
dc.subject | Methods: numerical | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | Identifying the progenitors of present-day early-type galaxies in observational surveys: correcting `progenitor bias' using the Horizon-AGN simulation | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | Centre of Data Innovation Research | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85040225602&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1093/mnras/stx3057 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |