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The ATLAS3D project - XXV: Two-dimensional kinematic analysis of simulated galaxies and the cosmological origin of fast and slow rotators
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dc.contributor.author | Naab, T. | |
dc.contributor.author | Oser, L. | |
dc.contributor.author | Emsellem, E. | |
dc.contributor.author | Cappellari, M. | |
dc.contributor.author | Krajnovic, D. | |
dc.contributor.author | McDermid, R. M. | |
dc.contributor.author | Alatalo, K. | |
dc.contributor.author | Bayet, E. | |
dc.contributor.author | Blitz, L. | |
dc.contributor.author | Bois, M. | |
dc.contributor.author | Bournaud, F. | |
dc.contributor.author | Bureau, M. | |
dc.contributor.author | Crocker, A. | |
dc.contributor.author | Davies, R. L. | |
dc.contributor.author | Davis, T. A. | |
dc.contributor.author | de Zeeuw, P. T. | |
dc.contributor.author | Duc, P.-A. | |
dc.contributor.author | Hirschmann, M. | |
dc.contributor.author | Johansson, P. H. | |
dc.contributor.author | Khochfar, S. | |
dc.contributor.author | Kuntschner, H. | |
dc.contributor.author | Morganti, R. | |
dc.contributor.author | Oosterloo, T. | |
dc.contributor.author | Sarzi, M. | |
dc.contributor.author | Scott, N. | |
dc.contributor.author | Serra, P. | |
dc.contributor.author | van de Ven, G. | |
dc.contributor.author | Weijmans, A. | |
dc.contributor.author | Young, L. M. | |
dc.date.accessioned | 2014-09-18T15:01:04Z | |
dc.date.available | 2014-09-18T15:01:04Z | |
dc.date.issued | 2014-11-11 | |
dc.identifier.citation | Naab , T , Oser , L , Emsellem , E , Cappellari , M , Krajnovic , D , McDermid , R M , Alatalo , K , Bayet , E , Blitz , L , Bois , M , Bournaud , F , Bureau , M , Crocker , A , Davies , R L , Davis , T A , de Zeeuw , P T , Duc , P-A , Hirschmann , M , Johansson , P H , Khochfar , S , Kuntschner , H , Morganti , R , Oosterloo , T , Sarzi , M , Scott , N , Serra , P , van de Ven , G , Weijmans , A & Young , L M 2014 , ' The ATLAS 3D project - XXV: Two-dimensional kinematic analysis of simulated galaxies and the cosmological origin of fast and slow rotators ' , Monthly Notices of the Royal Astronomical Society , vol. 444 , no. 4 , pp. 3357-3387 . https://doi.org/10.1093/mnras/stt1919 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | PURE: 144054061 | |
dc.identifier.other | PURE UUID: 287cafbe-956f-4c1e-a166-f845290f3f59 | |
dc.identifier.other | BibCode: 2013arXiv1311.0284N | |
dc.identifier.other | ORCID: /0000-0002-5908-6852/work/40233493 | |
dc.identifier.other | WOS: 000343400100026 | |
dc.identifier.other | Scopus: 84929415091 | |
dc.identifier.uri | https://hdl.handle.net/10023/5449 | |
dc.description.abstract | We present a detailed two-dimensional stellar dynamical analysis of as ample of 44 cosmological hydrodynamical simulations of individual central galaxies with stellar masses of 2 x 1010Msun ∼≤ Mstar ∼≤ 6x 1011Msun. Kinematic maps of the stellar line-of-sight velocity, velocity dispersion, and higher-order Gauss-Hermite moments h3 and h4 are constructed for each central galaxy and for the most massive satellites. The amount of rotation is quantified using the λR-parameter. The velocity, velocity dispersion, h3, and h4 fields of the simulated galaxies show a diversity similar to observed kinematic maps of early-type galaxies in the ATLAS3D survey. This includes fast (regular), slow, and misaligned rotation, hot spheroids with embedded cold disk components as well as galaxies with counter-rotating cores or central depressions in the velocity dispersion. We link the present-day kinematic properties to the individual cosmological formation histories of the galaxies. In general, major galaxy mergers have a significant influence on the rotation properties resulting in both a spin-down as well as a spin-up of the merger remnant. Lower mass galaxies with significant in-situ formation of stars, or with additional gas-rich major mergers - resulting in a spin-up - in their formation history, form elongated fast rotators with a clear anti-correlation of h3 and v/σ. An additional formation path for fast rotators includes gas-poor major mergers leading to a spin-up of the remnants. This formation path does not result in anti-correlated h3 and v/σ. The galaxies most consistent with the rare class of non-rotating round early-type galaxies grow by gas-poor minor mergers alone. In general, more massive galaxies have less in-situ star formation since z ∼ 2, rotate slower and have older stellar populations. (shortened) | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.rights | © 2014. The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society | en |
dc.subject | ISM: clouds | en |
dc.subject | ISM: kinematics and dynamics | en |
dc.subject | Stars: formation | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | The ATLAS3D project - XXV: Two-dimensional kinematic analysis of simulated galaxies and the cosmological origin of fast and slow rotators | en |
dc.type | Journal article | en |
dc.description.version | Postprint | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.1093/mnras/stt1919 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2013arXiv1311.0284N | en |
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