Faint Companions of Isolated 2MIG Galaxies
arXiv:1112.2821 · doi:10.1134/S1990341311040018
Abstract
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.
15 pages, 6 figures, 1 table
References in corpus (10)
- Galaxy groups and clouds in the Local (z~0.01) universe
- Evolution in the Halo Masses of Isolated Galaxies between z~1 and z~0: From DEEP2 to SDSS
- The AMIGA sample of isolated galaxies. V. Quantification of the isolation
- The Fossil Phase in the Life of a Galaxy Group
- Catalog of Isolated Galaxies Selected from the 2MASS Survey
- Binary Galaxies in the Local Supercluster and Its Neighborhood
- Massive Dark Matter Halos around Bright Isolated Galaxies in the 2dFGRS
- The Arecibo Galaxy Environment Survey III: Observations Toward the Galaxy Pair NGC 7332/7339 and the Isolated Galaxy NGC 1156
- Orbital Dependence of Galaxy Properties in Satellite Systems of Galaxies
- The Orbital Distribution of Satellite Galaxies
Cited by in corpus (12)
- Catalogues of isolated galaxies, isolated pairs, and isolated triplets in the local Universe
- Ages and abundances in large-scale stellar disks of nearby S0 galaxies
- The AMIGA sample of isolated galaxies XII. Revision of the isolation degree for AMIGA galaxies using the SDSS
- Effects of the environment on galaxies in the Catalogue of Isolated Galaxies: physical satellites and large scale structure
- Distance and mass of the M104 (Sombrero) group
- Tracing the Local Volume galaxy halo-to-stellar mass ratio with satellite kinematics
- Distance and mass of the NGC 253 galaxy group
- Around the Spindle galaxy: the dark halo mass of NGC3115
- Colours of isolated galaxies selected from the Two-Micron All-Sky Survey
- Properties of Stellar Populations in Isolated Lenticular Galaxies
- Ultra-Flat Galaxies Selected from RFGC Catalog. II. Orbital Estimates of Halo Masses
- Early-Type (E, S0) Galaxies in the Catalog of Isolated Galaxies (KIG)