V. E. Karachentseva, I. D. Karachentsev, O. V. Melnyk
We present the results of a search for companions around the isolated
galaxies from the 2MIG catalog. Among 3227 2MIG galaxies we detected 125
objects with a total of 214 neighbors having radial velocity differences of
Delta V < 500 km/s and projected separations of R_p < 500 kpc relative to the
2MIG galaxies. The median luminosity of the companions is 1/25 of the
luminosity of catalog galaxies, which has little effect on the dynamic
isolation of the latter. The median ratio of the orbital mass to the
K-luminosity determined from 60 companions of E and S0 2MIG galaxies, 63
M_sun/L_sun, is signficantly greater than that found from the spiral galaxy
companions (17 M_sun/L_sun). We note that a fraction of 2MIG galaxies with
companions may be a part of low-contrast diffuse structures: clouds and
filaments.
View original:
http://arxiv.org/abs/1112.2821
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