Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-15
Astron.J.132:729-748,2006
Astronomy and Astrophysics
Astrophysics
50 pages, 2 tables, 15 encapsulated figures, 1 (3 part) jpg figure. Submitted to Astronomical Journal
Scientific paper
10.1086/505466
Hubble 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.
Dolphin Andrew E.
Karachentsev Igor D.
Karachentseva Valentina E.
Makarov Dmitry I.
Makarova Lidia
No associations
LandOfFree
Associations of Dwarf Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Associations of Dwarf Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Associations of Dwarf Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-728752