The Dark and Baryonic Matter Content of Low Surface Brightness Galaxies

dc.contributor.authorde Blok, W.J.G.
dc.contributor.authorMcGaugh, S.S.
dc.date.accessioned2009-01-22T16:17:03Z
dc.date.available2009-01-22T16:17:03Z
dc.date.issued1997
dc.description.abstractWe present mass models of a sample of 19 low surface brightness (LSB) galaxies and compare the properties of their constituent mass components with those of a sample of high surface brightness (HSB) galaxies. We find that LSB galaxies are dark matter dominated. Their halo parameters are only slightly affected by assumptions on stellar mass-to-light ratios. Comparing LSB and HSB galaxies we find that mass models derived using the maximum disk hypothesis result in the disks of LSB galaxies having systematically higher stellar mass-to-light ratios than HSB galaxies of similar rotation velocity. This is inconsistent with all other available evidence on the evolution of LSB galaxies. We argue therefore that the maximum disk hypothesis does not provide a representative description of the LSB galaxies and their evolution. Mass models with stellar mass-to-light ratios determined by the colors and stellar velocity dispersions of galactic disks imply that LSB galaxies have dark matter halos that are more extended and less dense than those of HSB galaxies. Surface brightness is thus related to the halo properties. LSB galaxies are slowly evolving, low density and dark matter dominated galaxies.en
dc.format.extent709844 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationThe Dark and Baryonic Matter Content of Low Surface Brightness Galaxies. de Blok, W.J.G., & McGaugh, S.S. 1997, MNRAS, 290, 533-552en
dc.identifier.urihttp://hdl.handle.net/1903/8718
dc.language.isoen_USen
dc.publisherBlackwellen
dc.relation.isAvailableAtAstronomyen_us
dc.relation.isAvailableAtCollege of Computer, Mathematical & Physical Sciencesen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.rights.licenseThe definitive version is available at www.blackwell-synergy.com.
dc.subjectdark matteren
dc.subjectgalaxies: kinematics and dynamicsen
dc.subjectgalaxies: spiralen
dc.subjectgalaxies: fundamental parametersen
dc.subjectgalaxies: halosen
dc.titleThe Dark and Baryonic Matter Content of Low Surface Brightness Galaxiesen
dc.typeArticleen

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