Peculiar velocities of 3000 spiral galaxies from the 2MFGC catalog

摘要

The 2MFGC catalog we have used contains 18020 galaxies selected from the extended objects in the 2MASS infrared sky survey as having apparent ratios of the axes b/a < 0.3. Most of them are spiral galaxies of later morphological types whose disks are seen almost edge-on. The individual distances to the 2724 2MFGC galaxies with known rotation velocities and radial velocities are determined using a multiparameter infrared Tully-Fisher relation. A list of the distances and peculiar velocities of these galaxies is presented. The collective motion of the 2MFGC galaxies relative to the cosmic microwave background is characterized by a velocity V = 199 +/- 37 km/s in the direction 1 = 304 degrees +/- 11 degrees, b=-8 degrees +/- 8 degrees. Our list is currently the most representative and uniform sample for analyzing non-Hubble motions of galaxies on a scale of similar to 100 Mpc.