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.date.accessioned | 2018-08-20T11:06:04Z | |
dc.date.available | 2018-08-20T11:06:04Z | |
dc.date.issued | 2018-10-01 | |
dc.identifier.citation | Martin , G , Kaviraj , S , Devriendt , J E G , Dubois , Y & Pichon , C 2018 , ' The role of mergers in driving morphological transformation over cosmic time ' , Monthly Notices of the Royal Astronomical Society , vol. 480 , no. 2 , pp. 2266–2283 . https://doi.org/10.1093/mnras/sty1936 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1807.08761v1 | |
dc.identifier.other | ORCID: /0000-0002-5601-575X/work/77850215 | |
dc.identifier.uri | http://hdl.handle.net/2299/20476 | |
dc.description | Accepted for publication in MNRAS | |
dc.description.abstract | Understanding the processes that trigger morphological transformation is central to understanding how and why the Universe transitions from being disc-dominated at early epochs to having the morphological mix that is observed today. We use Horizon-AGN, a cosmological hydrodynamical simulation, to perform a comprehensive study of the processes that drive morphological change in massive (M*/M ⊙ > 10 10) galaxies over cosmic time. We show that (1) essentially all the morphological evolution in galaxies that are spheroids at z = 0 is driven by mergers with mass ratios greater than 1: 10; (2) major mergers alone cannot produce today's spheroid population - minor mergers are responsible for a third of all morphological transformation over cosmic time and are its dominant driver after z ~ 1; (3) prograde mergers trigger milder morphological transformation than retrograde mergers - while both types of event produce similar morphological changes at z > 2, the average change due to retrograde mergers is around twice that due to their prograde counterparts at z ~ 0; (4) remnant morphology depends strongly on the gas fraction of a merger, with gas-rich mergers routinely re-growing discs; and (5) at a given stellar mass, discs do not exhibit drastically different merger histories from spheroids - disc survival in mergers is driven by acquisition of cold gas (via cosmological accretion and gas-rich interactions) and a preponderance of prograde mergers in their merger histories. | en |
dc.format.extent | 18 | |
dc.format.extent | 5201748 | |
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: interactions | |
dc.subject | Methods: numerical | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | The role of mergers in driving morphological transformation over cosmic time | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | Centre of Data Innovation Research | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85055190984&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1093/mnras/sty1936 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |