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dc.contributor.authorYang, Meng
dc.contributor.authorWeijmans, Anne-Marie
dc.contributor.authorBershady, Matthew A.
dc.contributor.authorMerrifield, Michael
dc.contributor.authorBoardman, Nicholas F.
dc.contributor.authorDrory, Niv
dc.identifier.citationYang , M , Weijmans , A-M , Bershady , M A , Merrifield , M , Boardman , N F & Drory , N 2021 , ' An analytical model to kinematically identify thin discs in MaNGA galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 504 , no. 2 , pp. 2658–2669 .
dc.identifier.otherPURE: 273914608
dc.identifier.otherPURE UUID: feb28681-f7c8-4085-a8ba-19d125dacbda
dc.identifier.otherBibCode: 2021arXiv210407863Y
dc.identifier.otherORCID: /0000-0002-5908-6852/work/92775320
dc.identifier.otherWOS: 000659453800075
dc.identifier.otherScopus: 85107923304
dc.descriptionFunding: MY gratefully acknowledges the financial support from China Scholarship Council (CSC). MAB acknowledges support from NSF/AST-1517006.en
dc.description.abstractWe present an analytical model to identify thin discs in galaxies, and apply this model to a sample of SDSS MaNGA galaxies. This model fits the velocity and velocity dispersion fields of galaxies with regular kinematics. By introducing two parameters ζ related to the comparison of the model’s asymmetric drift correction to the observed gas kinematics and η related to the dominant component of a galaxy, we classify the galaxies in the sample as ”disc-dominated”, ”non-disc-dominated”, or ”disc-free” indicating galaxies with a dominating thin disc, a non-dominating thin disc, or no thin disc detection with our method, respectively. The dynamical mass resulting from our model correlates with stellar mass, and we investigate discrepancies by including gas mass and variation of the initial mass function. As expected, most spiral galaxies in the sample are disc-dominated, while ellipticals are predominantly disc-free. Lenticular galaxies show a dichotomy in their kinematic classification, which is related to their different star formation rates and gas fractions. We propose two possible scenarios to explain these results. In the first scenario, disc-free lenticulars formed in more violent processes than disc-dominated ones, while in the second scenario, the quenching processes in lenticulars lead to a change in their kinematic structures as disc-dominated lenticulars evolve to disc-free ones.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rightsCopyright © 2021 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
dc.subjectGalaxies:kinematics and dynamicsen
dc.subjectGalaxies: structureen
dc.subjectGalaxies: discen
dc.subjectGalaxies: evolutionen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleAn analytical model to kinematically identify thin discs in MaNGA galaxiesen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Centre for Contemporary Arten
dc.description.statusPeer revieweden

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