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The shape of dark matter haloes - II. The GALACTUS HI modelling & fitting tool

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dc.contributor.authorPeters, S. P C
dc.contributor.authorvan der Kruit, P C
dc.contributor.authorAllen, R J
dc.contributor.authorFreeman, Kenneth
dc.date.accessioned2020-12-20T20:58:13Z
dc.date.available2020-12-20T20:58:13Z
dc.date.issued2017
dc.date.updated2020-11-23T11:20:34Z
dc.description.abstractWe present a new HI modelling tool called GALACTUS. The program has been designed to perform automated fits of disc-galaxy models to observations. It includes a treatment for the self-absorption of gas. The software has been released into the public domain.We describe the design philosophy and inner workings of the program. After this, we model the face-on galaxy NGC 2403 using both self-absorption and optically thin models, showing that self-absorption occurs even in face-on galaxies. These results are then used to model an edge-on galaxy. It is shown that the maximum surface brightness plateaus seen in Paper I of this series are indeed signs of self-absorption. The apparent HI mass of an edge-on galaxy can be drastically lower compared with that same galaxy seen face-on. The Tully-Fisher relation is found to be relatively free from self-absorption issues
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/218524
dc.language.isoen_AUen_AU
dc.publisherBlackwell Publishing Ltd
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.titleThe shape of dark matter haloes - II. The GALACTUS HI modelling & fitting tool
dc.typeJournal article
local.bibliographicCitation.issue1
local.bibliographicCitation.lastpage31
local.bibliographicCitation.startpage21
local.contributor.affiliationPeters, S. P C, University of Groningen, Kapteyn Astronomical Institute
local.contributor.affiliationvan der Kruit, P C, University of Groningen Kapteyn Astronomical Institute
local.contributor.affiliationAllen, R J, Space Telescope Science Institute
local.contributor.affiliationFreeman, Kenneth, College of Science, ANU
local.contributor.authoruidFreeman, Kenneth, u7000399
local.description.notesImported from ARIES
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationa383154xPUB5372
local.identifier.citationvolume464
local.identifier.doi10.1093/mnras/stw2099
local.identifier.scopusID2-s2.0-85014791690
local.identifier.thomsonID000393646300002
local.type.statusPublished Version

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