Disk mass and disk heating in the spiral galaxy NGC 3223

dc.contributor.authorGentile, G
dc.contributor.authorTydtgat, C
dc.contributor.authorBaes, M
dc.contributor.authorDe Geyter, G
dc.contributor.authorKoleva, M
dc.contributor.authorAngus, G W
dc.contributor.authorde Blok, W J G
dc.contributor.authorSaftly, W
dc.contributor.authorViaene, S
dc.date.accessioned2021-10-08T06:20:33Z
dc.date.available2021-10-08T06:20:33Z
dc.date.issued2015
dc.description.abstractWe present the stellar and gaseous kinematics of an Sb galaxy, NGC 3223, with the aim of determining the vertical and radial stellar velocity dispersion as a function of radius, which can help to constrain disk heating theories. Together with the observed NIR photometry, the vertical velocity dispersion is also used to determine the stellar mass-to-light (M/L) ratio, typically one of the largest uncertainties when deriving the dark matter distribution from the observed rotation curve. We find a vertical-to-radial velocity dispersion ratio of sigma(z)/sigma(R) = 1.21 +/- 0.14, significantly higher than expectations from known correlations, and a weakly-constrained Ks-band stellar M/L ratio in the range 0.5-1.7, which is at the high end of (but consistent with) the predictions of stellar population synthesis models. Such a weak constraint on the stellar M/L ratio, however, does not allow us to securely determine the dark matter density distribution. To achieve this, either a statistical approach or additional data (e.g. integral-field unit) are needed.
dc.identifier.apacitationGentile, G., Tydtgat, C., Baes, M., De Geyter, G., Koleva, M., Angus, G. W., ... Viaene, S. (2015). Disk mass and disk heating in the spiral galaxy NGC 3223. <i>Astronomy and Astrophysics</i>, 576(4), A57 - 177. http://hdl.handle.net/11427/34304en_ZA
dc.identifier.chicagocitationGentile, G, C Tydtgat, M Baes, G De Geyter, M Koleva, G W Angus, W J G de Blok, W Saftly, and S Viaene "Disk mass and disk heating in the spiral galaxy NGC 3223." <i>Astronomy and Astrophysics</i> 576, 4. (2015): A57 - 177. http://hdl.handle.net/11427/34304en_ZA
dc.identifier.citationGentile, G., Tydtgat, C., Baes, M., De Geyter, G., Koleva, M., Angus, G.W., de Blok, W.J.G. & Saftly, W. et al. 2015. Disk mass and disk heating in the spiral galaxy NGC 3223. <i>Astronomy and Astrophysics.</i> 576(4):A57 - 177. http://hdl.handle.net/11427/34304en_ZA
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.ris TY - Journal Article AU - Gentile, G AU - Tydtgat, C AU - Baes, M AU - De Geyter, G AU - Koleva, M AU - Angus, G W AU - de Blok, W J G AU - Saftly, W AU - Viaene, S AB - We present the stellar and gaseous kinematics of an Sb galaxy, NGC 3223, with the aim of determining the vertical and radial stellar velocity dispersion as a function of radius, which can help to constrain disk heating theories. Together with the observed NIR photometry, the vertical velocity dispersion is also used to determine the stellar mass-to-light (M/L) ratio, typically one of the largest uncertainties when deriving the dark matter distribution from the observed rotation curve. We find a vertical-to-radial velocity dispersion ratio of sigma(z)/sigma(R) = 1.21 +/- 0.14, significantly higher than expectations from known correlations, and a weakly-constrained Ks-band stellar M/L ratio in the range 0.5-1.7, which is at the high end of (but consistent with) the predictions of stellar population synthesis models. Such a weak constraint on the stellar M/L ratio, however, does not allow us to securely determine the dark matter density distribution. To achieve this, either a statistical approach or additional data (e.g. integral-field unit) are needed. DA - 2015 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - Astronomy and Astrophysics LK - https://open.uct.ac.za PY - 2015 SM - 0004-6361 SM - 1432-0746 T1 - Disk mass and disk heating in the spiral galaxy NGC 3223 TI - Disk mass and disk heating in the spiral galaxy NGC 3223 UR - http://hdl.handle.net/11427/34304 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34304
dc.identifier.vancouvercitationGentile G, Tydtgat C, Baes M, De Geyter G, Koleva M, Angus GW, et al. Disk mass and disk heating in the spiral galaxy NGC 3223. Astronomy and Astrophysics. 2015;576(4):A57 - 177. http://hdl.handle.net/11427/34304.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceAstronomy and Astrophysics
dc.source.journalissue4
dc.source.journalvolume576
dc.source.paginationA57 - 177
dc.source.urihttps://dx.doi.org/10.1051/0004-6361/201425279
dc.subject.otherPhysics and Astronomy
dc.subject.othergalaxies: individual: NGC 3223
dc.subject.othergalaxies: kinematics and dynamics
dc.subject.othergalaxies: structure
dc.subject.otherSURFACE BRIGHTNESS GALAXIES
dc.subject.otherRESOLUTION ROTATION CURVES
dc.subject.otherTO-LIGHT-RATIO
dc.subject.otherDARK-MATTER
dc.subject.otherDWARF GALAXIES
dc.subject.otherBARYONIC MATTER
dc.subject.otherGALACTIC DISCS
dc.subject.otherSTAR-FORMATION
dc.subject.otherSTELLAR DISCS
dc.subject.otherHALO MASS
dc.titleDisk mass and disk heating in the spiral galaxy NGC 3223
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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