Associations of Dwarf Galaxies

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dc.creatorTully, R B
dc.creatorRizzi, L
dc.creatorDolphin, A E
dc.creatorKarachentsev, I D
dc.creatorKarachentseva, V E
dc.creatorMakarov, D I
dc.creatorMakarova, L
dc.creatorSakai, S
dc.creatorShaya, E J
dc.date2006-03-15
dc.date.accessioned2026-07-07T11:25:22Z
dc.date.available2026-07-07T11:25:22Z
dc.descriptionHubble Space Telescope Advanced Cameras for Surveys has been used to determine accurate distances for 20 galaxies from measurements of the luminosity of the brightest red giant branch stars. Five associations of dwarf galaxies that had originally been identified based on strong correlations on the plane of the sky and in velocity are shown to be equally well correlated in distance. Two more associations with similar properties have been discovered. Another association is identified that is suggested to be unbound through tidal disruption. The associations have the spatial and kinematic properties expected of bound structures with 1 - 10 x 10^11 solar mass. However, these entities have little light with the consequence that mass-to-light ratios are in the range 100 - 1000 in solar units. Within a well surveyed volume extending to 3 Mpc, all but one known galaxy lies within one of the groups or associations that have been identified.
dc.description50 pages, 2 tables, 15 encapsulated figures, 1 (3 part) jpg figure. Submitted to Astronomical Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0603380
dc.identifierhttp://arxiv.org/abs/astro-ph/0603380
dc.identifierAstron.J.132:729-748,2006
dc.identifierdoi:10.1086/505466
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195485
dc.subjectAstrophysics
dc.titleAssociations of Dwarf Galaxies
dc.typetext

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