References of "Karachentsev, I. D"
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See detailFaint companions of isolated 2MIG galaxies
Karachentseva, V. E.; Karachentsev, I. D.; Melnyk, Olga ULg

in Astrophysical Bulletin (2011), 66

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 ... [more ▼]

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 Δ V < 500 km/s and projected separations of Rp < 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 Msolar/Lsolar, is significantly greater than that found from the spiral galaxy companions (17 Msolar/Lsolar). We note that a fraction of 2MIG galaxies with companions may be a part of low-contrast diffuse structures: clouds and filaments. [less ▲]

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See detailCatalog of nearby isolated galaxies in the volume z < 0.01
Karachentsev, I. D.; Makarov, D. I.; Karachentseva, V. E. et al

in Astrophysical Bulletin (2011), 66

We present a catalog of 520 most isolated nearby galaxies with angular velocities V_LG < 3500 km/s, covering the entire sky. This population of "space orphans" makes up 4.8% among 10 900 galaxies with ... [more ▼]

We present a catalog of 520 most isolated nearby galaxies with angular velocities V_LG < 3500 km/s, covering the entire sky. This population of "space orphans" makes up 4.8% among 10 900 galaxies with measured radial velocities. We describe the isolation criterion used to select our sample, called the "Local Orphan Galaxies"(LOG), and discuss their basic optical and HI properties. A half of the LOG catalog is occupied by the Sdm, Im and Ir morphological type galaxies without a bulge. The median ratio Mgas/ Mstar in the LOG galaxies exceeds 1. The distribution of the catalog galaxies on the sky looks uniform with some signatures of a weak clustering on the scale of about 0.5 Mpc. The LOG galaxies are located in the regions where the mean local density of matter is approximately 50 times lower than the mean global density. We indicate a number of LOG galaxies with distorted structures, which may be the consequence of interaction of isolated galaxies with massive dark objects. [less ▲]

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