HALOGAS: Extraplanar gas in NGC 3198

Simple item page
dc.contributor.authorGentile, G
dc.contributor.authorJózsa, G I G
dc.contributor.authorSerra, P
dc.contributor.authorHeald, G H
dc.contributor.authorde Blok, W J G
dc.contributor.authorFraternali, F
dc.contributor.authorPatterson, M T
dc.contributor.authorWalterbos, R A M
dc.contributor.authorOosterloo, T
dc.date.accessioned2021-10-08T11:01:09Z
dc.date.available2021-10-08T11:01:09Z
dc.date.issued2013
dc.description.abstractWe present the analysis of new, deep HI observations of the spiral galaxy NGC 3198, as part of the HALOGAS (Westerbork Hydrogen Accretion in LOcal GAlaxieS) survey, with the main aim of investigating the presence, amount, morphology and kinematics of extraplanar gas. We present models of the HI observations of NGC 3198: the model that matches best the observed data cube features a thick disk with a scale height of ~3 kpc and an HI mass of about 15% of the total HI mass; this thick disk also has a decrease in rotation velocity as a function of height (lag) of 7-15 km/s/kpc (though with large uncertainties). This extraplanar gas is detected for the first time in NGC 3198. Radially, this gas appears to extend slightly beyond the actively star-forming body of the galaxy (as traced by the Halpha emission), but it is not more radially extended than the outer, fainter parts of the stellar disk. Compared to previous studies, thanks to the improved sensitivity we trace the rotation curve out to larger radii. We model the rotation curve in the framework of MOND (Modified Newtonian Dynamics) and we confirm that, with the allowed distance range we assumed, fit quality is modest in this galaxy, but the new outer parts are explained in a satisfactory way.
dc.identifier.apacitationGentile, G., Józsa, G. I. G., Serra, P., Heald, G. H., de Blok, W. J. G., Fraternali, F., ... Oosterloo, T. (2013). HALOGAS: Extraplanar gas in NGC 3198. <i>Astronomy and Astrophysics</i>, 554(4), A125 - 177. http://hdl.handle.net/11427/35096en_ZA
dc.identifier.chicagocitationGentile, G, G I G Józsa, P Serra, G H Heald, W J G de Blok, F Fraternali, M T Patterson, R A M Walterbos, and T Oosterloo "HALOGAS: Extraplanar gas in NGC 3198." <i>Astronomy and Astrophysics</i> 554, 4. (2013): A125 - 177. http://hdl.handle.net/11427/35096en_ZA
dc.identifier.citationGentile, G., Józsa, G.I.G., Serra, P., Heald, G.H., de Blok, W.J.G., Fraternali, F., Patterson, M.T. & Walterbos, R.A.M. et al. 2013. HALOGAS: Extraplanar gas in NGC 3198. <i>Astronomy and Astrophysics.</i> 554(4):A125 - 177. http://hdl.handle.net/11427/35096en_ZA
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.ris TY - Journal Article AU - Gentile, G AU - Józsa, G I G AU - Serra, P AU - Heald, G H AU - de Blok, W J G AU - Fraternali, F AU - Patterson, M T AU - Walterbos, R A M AU - Oosterloo, T AB - We present the analysis of new, deep HI observations of the spiral galaxy NGC 3198, as part of the HALOGAS (Westerbork Hydrogen Accretion in LOcal GAlaxieS) survey, with the main aim of investigating the presence, amount, morphology and kinematics of extraplanar gas. We present models of the HI observations of NGC 3198: the model that matches best the observed data cube features a thick disk with a scale height of ~3 kpc and an HI mass of about 15% of the total HI mass; this thick disk also has a decrease in rotation velocity as a function of height (lag) of 7-15 km/s/kpc (though with large uncertainties). This extraplanar gas is detected for the first time in NGC 3198. Radially, this gas appears to extend slightly beyond the actively star-forming body of the galaxy (as traced by the Halpha emission), but it is not more radially extended than the outer, fainter parts of the stellar disk. Compared to previous studies, thanks to the improved sensitivity we trace the rotation curve out to larger radii. We model the rotation curve in the framework of MOND (Modified Newtonian Dynamics) and we confirm that, with the allowed distance range we assumed, fit quality is modest in this galaxy, but the new outer parts are explained in a satisfactory way. DA - 2013 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - Astronomy and Astrophysics LK - https://open.uct.ac.za PY - 2013 SM - 0004-6361 SM - 1432-0746 T1 - HALOGAS: Extraplanar gas in NGC 3198 TI - HALOGAS: Extraplanar gas in NGC 3198 UR - http://hdl.handle.net/11427/35096 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/35096
dc.identifier.vancouvercitationGentile G, Józsa GIG, Serra P, Heald GH, de Blok WJG, Fraternali F, et al. HALOGAS: Extraplanar gas in NGC 3198. Astronomy and Astrophysics. 2013;554(4):A125 - 177. http://hdl.handle.net/11427/35096.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceAstronomy and Astrophysics
dc.source.journalissue4
dc.source.journalvolume554
dc.source.paginationA125 - 177
dc.source.urihttps://dx.doi.org/10.1051/0004-6361/201321116
dc.subject.otherPhysics and Astronomy
dc.subject.othergalaxies: ISM
dc.subject.othergalaxies: halos
dc.subject.othergalaxies: kinematics and dynamics
dc.subject.othergalaxies: individual
dc.subject.othergalaxies: structure
dc.subject.otherHIGH-VELOCITY CLOUDS
dc.subject.otherTELESCOPE KEY PROJECT
dc.subject.otherDIFFUSE IONIZED-GAS
dc.subject.otherBONN DEEP SURVEY
dc.subject.otherSPIRAL GALAXIES
dc.subject.otherROTATION CURVES
dc.subject.otherDISK GALAXIES
dc.subject.otherNEWTONIAN DYNAMICS
dc.subject.otherDARK-MATTER
dc.subject.otherMASS
dc.titleHALOGAS: Extraplanar gas in NGC 3198
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
GentileG_HALOGAS_Extrapl_2013.pdf
Size:
2.96 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Journal Articles