HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure

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dc.contributor.authorde Blok, W J G
dc.contributor.authorJózsa, G I G
dc.contributor.authorPatterson, M
dc.contributor.authorGentile, G
dc.contributor.authorHeald, G H
dc.contributor.authorJYtte, E
dc.contributor.authorKamphuis, P
dc.contributor.authorRand, R J
dc.contributor.authorSerra, P
dc.contributor.authorWalterbos, R A M
dc.date.accessioned2021-10-08T11:01:12Z
dc.date.available2021-10-08T11:01:12Z
dc.date.issued2014
dc.description.abstractWe present deep H I imaging of the nearby spiral galaxy NGC 4414, taken as part of the Westerbork HALOGAS (Hydrogen Accretion in LOcal GAlaxieS) survey. The observations show that NGC 4414 can be characterized by a regularly rotating inner H I disk, and a more disturbed outer disk. Modeling of the kinematics shows that the outer disk is best described by a U-shaped warp. Deep optical imaging also reveals the presence of a low surface brightness stellar shell, indicating a minor interaction with a dwarf galaxy at some stage in the past. Modeling of the inner disk suggests that about 4 percent of the inner H I is in the form of extra-planar gas. Because of the disturbed nature of the outer disk, this number is difficult to constrain for the galaxy as a whole. These new, deep observations of NGC 4414 presented here show that even apparently undisturbed galaxies are interacting with their environment.
dc.identifier.apacitationde Blok, W. J. G., Józsa, G. I. G., Patterson, M., Gentile, G., Heald, G. H., JYtte, E., ... Walterbos, R. A. M. (2014). HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure. <i>Astronomy and Astrophysics</i>, 566(4), A80 - 177. http://hdl.handle.net/11427/35105en_ZA
dc.identifier.chicagocitationde Blok, W J G, G I G Józsa, M Patterson, G Gentile, G H Heald, E JYtte, P Kamphuis, R J Rand, P Serra, and R A M Walterbos "HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure." <i>Astronomy and Astrophysics</i> 566, 4. (2014): A80 - 177. http://hdl.handle.net/11427/35105en_ZA
dc.identifier.citationde Blok, W.J.G., Józsa, G.I.G., Patterson, M., Gentile, G., Heald, G.H., JYtte, E., Kamphuis, P. & Rand, R.J. et al. 2014. HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure. <i>Astronomy and Astrophysics.</i> 566(4):A80 - 177. http://hdl.handle.net/11427/35105en_ZA
dc.identifier.issn0004-6361
dc.identifier.issn1432-0746
dc.identifier.ris TY - Journal Article AU - de Blok, W J G AU - Józsa, G I G AU - Patterson, M AU - Gentile, G AU - Heald, G H AU - JYtte, E AU - Kamphuis, P AU - Rand, R J AU - Serra, P AU - Walterbos, R A M AB - We present deep H I imaging of the nearby spiral galaxy NGC 4414, taken as part of the Westerbork HALOGAS (Hydrogen Accretion in LOcal GAlaxieS) survey. The observations show that NGC 4414 can be characterized by a regularly rotating inner H I disk, and a more disturbed outer disk. Modeling of the kinematics shows that the outer disk is best described by a U-shaped warp. Deep optical imaging also reveals the presence of a low surface brightness stellar shell, indicating a minor interaction with a dwarf galaxy at some stage in the past. Modeling of the inner disk suggests that about 4 percent of the inner H I is in the form of extra-planar gas. Because of the disturbed nature of the outer disk, this number is difficult to constrain for the galaxy as a whole. These new, deep observations of NGC 4414 presented here show that even apparently undisturbed galaxies are interacting with their environment. DA - 2014 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - Astronomy and Astrophysics LK - https://open.uct.ac.za PY - 2014 SM - 0004-6361 SM - 1432-0746 T1 - HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure TI - HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure UR - http://hdl.handle.net/11427/35105 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/35105
dc.identifier.vancouvercitationde Blok WJG, Józsa GIG, Patterson M, Gentile G, Heald GH, JYtte E, et al. HALOGAS observations of NGC 4414: fountains, interaction, and ram pressure. Astronomy and Astrophysics. 2014;566(4):A80 - 177. http://hdl.handle.net/11427/35105.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceAstronomy and Astrophysics
dc.source.journalissue4
dc.source.journalvolume566
dc.source.paginationA80 - 177
dc.source.urihttps://dx.doi.org/10.1051/0004-6361/201322517
dc.subject.otherPhysics and Astronomy
dc.subject.othergalaxies: ISM
dc.subject.othergalaxies: halos
dc.subject.othergalaxies: kinematics and dynamics
dc.subject.othergalaxies: individual: NGC 4414
dc.subject.othergalaxies: structure
dc.subject.otherISOLATED SPIRAL NGC-4414
dc.subject.otherSHELL GALAXIES
dc.subject.otherDISK GALAXIES
dc.subject.otherDARK-MATTER
dc.subject.otherH I
dc.subject.otherGAS
dc.subject.otherLOPSIDEDNESS
dc.subject.otherTHINGS
dc.subject.otherMASS
dc.subject.otherPOTENTIALS
dc.titleHALOGAS observations of NGC 4414: fountains, interaction, and ram pressure
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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