Peculiar velocities of 3000 spiral galaxies from the 2MFGC catalog |
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Authors: | I D Karachentsev Yu N Kudrya V E Karachentseva S N Mitronova |
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Institution: | (1) Special Astrophysical Observatory, Russian Academy of Sciences, Russia;(2) Astronomical Observatory of the Taras Shevchenko Kiev National University, Ukraine |
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Abstract: | 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 l = 304° ±11°, b = −8°±8°. Our list is currently the most representative
and uniform sample for analyzing non-Hubble motions of galaxies on a scale of ∼100 Mpc.
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Translated from Astrofizika, Vol. 49, No. 4, pp. 527–540 (November 2006). |
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Keywords: | galaxies Tully-Fisher relation large-scale motions |
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