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A high-resolution rotation curve of NGC 6822: a test-case for cold dark matter

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dc.contributor.authorWeldrake, David
dc.contributor.authorWalter, F
dc.contributor.authorde Blok, Willem
dc.date.accessioned2015-12-07T22:21:01Z
dc.date.issued2003
dc.date.updated2015-12-07T08:53:08Z
dc.description.abstractWe present high-resolution rotation curves of the Local Group dwarf irregular galaxy NGC 6822 obtained with the Australia Telescope Compact Array. Our best curves have an angular resolution of 8 arcsec or 20 pc and contain some 250 independent points. The stellar and gas components of NGC 6822 cannot explain the shape of the curve, except for the very inner regions, and NGC 6822 is consequently very dark-matter-dominated. There is no evidence for the presence of a steep density cusp down to scales of ∼20 pc, contrary to the predictions of cold dark matter.
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/19849
dc.publisherBlackwell Publishing Ltd
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectKeywords: Dark matter; Galaxies: Dwarf; Galaxies: fundamental parameters; Galaxies: Individual: NGC 6822; Galaxies: Kinematics and dynamics; Local group
dc.titleA high-resolution rotation curve of NGC 6822: a test-case for cold dark matter
dc.typeJournal article
local.bibliographicCitation.lastpage28
local.bibliographicCitation.startpage12
local.contributor.affiliationWeldrake, David, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWalter, F, California Institute of Technology
local.contributor.affiliationde Blok, Willem, College of Physical and Mathematical Sciences, ANU
local.contributor.authoruidWeldrake, David, u4031338
local.contributor.authoruidde Blok, Willem, u4191932
local.description.notesImported from ARIES
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu3379551xPUB10
local.identifier.citationvolume340
local.identifier.doi10.1046/j.1365-8711.2003.06170.x
local.identifier.scopusID2-s2.0-0041833506
local.type.statusPublished Version

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