Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ap.....49....3k&link_type=abstract
Astrophysics, Volume 49, Issue 1, pp.3-18
Astronomy and Astrophysics
Astrophysics
14
Galaxies, Local Group, M81 Group-Galaxies, Masses
Scientific paper
Based on high precision measurements of the distances to nearby galaxies with the Hubble telescope, we have determined the radii of the zero velocity spheres for the local group, R0 = 0.96±0.03Mpc, and for the group of galaxies around M 81/M 82, 0.89±0.05Mpc. These yield estimates of MT = (1.29±0.14)· 1012 M&sun; and (1.03±0.17)· 1012 M&sun;, respectively, for the total masses of these groups. The R0 method allows us to determine the mass ratios for the two brightest members in both groups, as well. By varying the position of the center of mass between the two principal members of a group to obtain minimal scatter in the galaxies on a Hubble diagram, we find mass ratios of 0.8:1.0 for our galaxy and Andromeda and 0.54:1.00 for the M82 and M81 galaxies, in good agreement with the observed ratios of the luminosities of these galaxies.
Karachentsev Igor D.
Kashibadze O. G.
No associations
LandOfFree
Masses of the local group and of the M81 group estimated from distortions in the local velocity field 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 Masses of the local group and of the M81 group estimated from distortions in the local velocity field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Masses of the local group and of the M81 group estimated from distortions in the local velocity field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1284126