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Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics
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dc.contributor.author | Yang, Meng | |
dc.contributor.author | Zhu, Ling | |
dc.contributor.author | Weijmans, Anne-Marie | |
dc.contributor.author | van de Ven, Glenn | |
dc.contributor.author | Boardman, Nicholas | |
dc.contributor.author | Morganti, Raffaella | |
dc.contributor.author | Oosterloo, Tom | |
dc.date.accessioned | 2020-01-17T17:30:02Z | |
dc.date.available | 2020-01-17T17:30:02Z | |
dc.date.issued | 2019-11-26 | |
dc.identifier.citation | Yang , M , Zhu , L , Weijmans , A-M , van de Ven , G , Boardman , N , Morganti , R & Oosterloo , T 2019 , ' Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics ' , Monthly Notices of the Royal Astronomical Society , vol. 491 , no. 3 , pp. 4221-4231 . https://doi.org/10.1093/mnras/stz3293 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | PURE: 265771235 | |
dc.identifier.other | PURE UUID: df5202c1-65d0-429e-9865-e203c4462d18 | |
dc.identifier.other | BibCode: 2020MNRAS.491.4221Y | |
dc.identifier.other | ORCID: /0000-0002-5908-6852/work/67525903 | |
dc.identifier.other | WOS: 000512306500082 | |
dc.identifier.other | Scopus: 85085150747 | |
dc.identifier.uri | https://hdl.handle.net/10023/19304 | |
dc.description.abstract | We present an orbit-based method of combining stellar and cold gas kinematics to constrain the dark matter profile of early-type galaxies. We apply this method to early-type galaxy NGC 2974, using Pan-STARRS imaging and SAURON stellar kinematics to model the stellar orbits, and introducing H I kinematics from VLA observation as a tracer of the gravitational potential. The introduction of the cold gas kinematics shows a significant effect on the confidence limits of especially the dark halo properties: we exclude more than 95 per cent of models within the 1σ confidence level of Schwarzschild modelling with only stellar kinematics, and reduce the relative uncertainty of the dark matter fraction significantly to 10 per cent within 5Re. Adopting a generalized Navarro-Frenk-White (NFW) dark matter profile, we measure a shallow cuspy inner slope of 0.6^{+0.2}_{-0.3} when including the cold gas kinematics in our model. We cannot constrain the inner slope with the stellar kinematics alone. | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.rights | Copyright © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1093/mnras/stz3293 | en |
dc.subject | Galaxies: haloes | en |
dc.subject | Galaxies: kinematics and dynamics | en |
dc.subject | Galaxies: structure | en |
dc.subject | Dark matter | en |
dc.subject | QB Astronomy | en |
dc.subject | DAS | en |
dc.subject.lcc | QB | en |
dc.title | Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics | 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.contributor.institution | University of St Andrews. Centre for Contemporary Art | en |
dc.identifier.doi | https://doi.org/10.1093/mnras/stz3293 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2020MNRAS.491.4221Y | en |
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