A massive spiral galaxy in the zone of avoidance

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dc.contributor.authorDonley, J L
dc.contributor.authorKoribalski, B S
dc.contributor.authorStaveley-Smith, L
dc.contributor.authorKraan-Korteweg, R C
dc.contributor.authorSchroder, A
dc.contributor.authorHenning, P A
dc.date.accessioned2016-07-22T12:40:44Z
dc.date.available2016-07-22T12:40:44Z
dc.date.issued2006
dc.date.updated2015-12-18T13:21:03Z
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society (ISSN: 0035-8711) ©: 2006 Donley et al. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dc.description.abstractWe report the discovery of a very HI-massive disc galaxy, HIZOAJ0836-43, at a velocity of vhel = 10689kms-1, corresponding to a distance of 148Mpc (assuming H0 = 75kms-1Mpc-1). It was found during the course of a systematic HI survey of the southern Zone of Avoidance (ZOA) (|b| <= 5°) with the multibeam system at the 64-m Parkes radio telescope. Follow-up observations with the Australia Telescope Compact Array reveal an extended HI disc. We derive an HI mass of 7.5 × 1010Msolar. Using the HI radius, we estimate a total dynamical mass of 1.4 × 1012Msolar, similar to the most massive known disc galaxies such as Malin1. HIZOAJ0836-43 lies deep in the ZOA where the optical extinction is very high, AB = 9.8mag. However, in the near-infrared (NIR) wavebands, where the extinction is considerably lower, HIZOAJ0836-43 is clearly detected by both the Deep Near Infrared Survey of the Southern Sky (DENIS) and Two-Micron All-Sky Survey (2MASS). Deep Anglo-Australian Telescope NIR (Ks and H band) images show that HIZOAJ0836-43 is an inclined disc galaxy with a prominent bulge (scalelength 2.5arcsec or 1.7kpc), and an extended disc (scalelength 7arcsec or 4.7kpc) which can be traced along the major axis out to a radius of 20arcsec or 13.4kpc (at 20magarcsec-2 in Ks). The HI disc is much more extended, having a radius of 66kpc at 1Msolarpc-2. Detections in the radio continuum at 1.4GHz and at 60μm (IRAS) are consistent with HIZOAJ0836-43 forming stars at a rate of ~35Msolaryr-1. We compare the properties of HIZOAJ0836-43 with those of the most HI-massive galaxies currently known, UGC4288, UGC1752 and Malin1, all of which are classified as giant low surface brightness galaxies. The observations were obtained with the Australia Telescope which is funded by the Commonwealth of Australia for operations as a National Facility managed by CSIRO.en_ZA
dc.identifier.apacitationDonley, J. L., Koribalski, B. S., Staveley-Smith, L., Kraan-Korteweg, R. C., Schroder, A., & Henning, P. A. (2006). A massive spiral galaxy in the zone of avoidance. <i>Monthly Notices of the Royal Astronomical Society</i>, http://hdl.handle.net/11427/20596en_ZA
dc.identifier.chicagocitationDonley, J L, B S Koribalski, L Staveley-Smith, R C Kraan-Korteweg, A Schroder, and P A Henning "A massive spiral galaxy in the zone of avoidance." <i>Monthly Notices of the Royal Astronomical Society</i> (2006) http://hdl.handle.net/11427/20596en_ZA
dc.identifier.citationDonley, J. L., Koribalski, B. S., Staveley-Smith, L., Kraan-Korteweg, R. C., Schröder, A., & Henning, P. A. (2006). A massive spiral galaxy in the Zone of Avoidance. Monthly Notices of the Royal Astronomical Society, 369(4), 1741-1754.en_ZA
dc.identifier.issn1365-2966en_ZA
dc.identifier.ris TY - Journal Article AU - Donley, J L AU - Koribalski, B S AU - Staveley-Smith, L AU - Kraan-Korteweg, R C AU - Schroder, A AU - Henning, P A AB - We report the discovery of a very HI-massive disc galaxy, HIZOAJ0836-43, at a velocity of vhel = 10689kms-1, corresponding to a distance of 148Mpc (assuming H0 = 75kms-1Mpc-1). It was found during the course of a systematic HI survey of the southern Zone of Avoidance (ZOA) (|b| <= 5°) with the multibeam system at the 64-m Parkes radio telescope. Follow-up observations with the Australia Telescope Compact Array reveal an extended HI disc. We derive an HI mass of 7.5 × 1010Msolar. Using the HI radius, we estimate a total dynamical mass of 1.4 × 1012Msolar, similar to the most massive known disc galaxies such as Malin1. HIZOAJ0836-43 lies deep in the ZOA where the optical extinction is very high, AB = 9.8mag. However, in the near-infrared (NIR) wavebands, where the extinction is considerably lower, HIZOAJ0836-43 is clearly detected by both the Deep Near Infrared Survey of the Southern Sky (DENIS) and Two-Micron All-Sky Survey (2MASS). Deep Anglo-Australian Telescope NIR (Ks and H band) images show that HIZOAJ0836-43 is an inclined disc galaxy with a prominent bulge (scalelength 2.5arcsec or 1.7kpc), and an extended disc (scalelength 7arcsec or 4.7kpc) which can be traced along the major axis out to a radius of 20arcsec or 13.4kpc (at 20magarcsec-2 in Ks). The HI disc is much more extended, having a radius of 66kpc at 1Msolarpc-2. Detections in the radio continuum at 1.4GHz and at 60μm (IRAS) are consistent with HIZOAJ0836-43 forming stars at a rate of ~35Msolaryr-1. We compare the properties of HIZOAJ0836-43 with those of the most HI-massive galaxies currently known, UGC4288, UGC1752 and Malin1, all of which are classified as giant low surface brightness galaxies. The observations were obtained with the Australia Telescope which is funded by the Commonwealth of Australia for operations as a National Facility managed by CSIRO. DA - 2006 DB - OpenUCT DP - University of Cape Town J1 - Monthly Notices of the Royal Astronomical Society LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 SM - 1365-2966 T1 - A massive spiral galaxy in the zone of avoidance TI - A massive spiral galaxy in the zone of avoidance UR - http://hdl.handle.net/11427/20596 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20596
dc.identifier.vancouvercitationDonley JL, Koribalski BS, Staveley-Smith L, Kraan-Korteweg RC, Schroder A, Henning PA. A massive spiral galaxy in the zone of avoidance. Monthly Notices of the Royal Astronomical Society. 2006; http://hdl.handle.net/11427/20596.en_ZA
dc.languageengen_ZA
dc.publisherOxford University Pressen_ZA
dc.publisher.departmentDepartment of Astronomyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.sourceMonthly Notices of the Royal Astronomical Societyen_ZA
dc.source.urihttp://mnras.oxfordjournals.org/
dc.titleA massive spiral galaxy in the zone of avoidanceen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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