The Bulk Motion of Flat Edge-On Galaxies Based on 2MASS Photometry

Abstract

We report the results of applying the 2MASS Tully-Fisher (TF) relations to study the galaxy bulk flows. For 1141 all-sky distributed flat RFGC galaxies we construct J, H, K_s TF relations and find that Kron $J_{fe}$ magnitudes show the smallest dispersion on the TF diagram. For the sample of 971 RFGC galaxies with V_{3K} < 18000 km/s we find a dispersion ${\sigma }_{TF}=0.42^m$ and an amplitude of bulk flow V= 199 +/-61 km/s, directed towards l=301 degr +/-18 degr, b=-2 degr +/-15 degr. Our determination of low-amplitude coherent flow is in good agreement with a set of recent data derived from EFAR, PSCz, SCI/SCII samples. The resultant two- dimensional smoothed peculiar velocity field traces well the large-scale density variations in the galaxy distributions. The regions of large positive peculiar velocities lie in the direction of the Great Attractor and Shapley concentration. A significant negative peculiar velocity is seen in the direction of Bootes and in the direction of the Local void. A small positive peculiar velocity (100 -- 150 km/s) is seen towards the Pisces-Perseus supercluster, as well as the Hercules - Coma - Corona Borealis supercluster regions.

arXiv comment10 pages, 5 figures. A&A/2003/3582 accepted 15.05.2003

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Cited by in corpus (15)

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• Scaling Relations of Spiral Galaxies
• Hubble flow around Fornax cluster of galaxies
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• An Unbiased Method of Modeling the Local Peculiar Velocity Field with Type Ia Supernovae
• The Edge-on Galaxies in the Pan-STARRS survey (EGIPS)
• Peculiar Velocities of 3000 Spiral Galaxies from the 2MFGC Catalog
• Large-scale collective motion of RFGC galaxies
• The Tully-Fisher relation for flat galaxies
• HI Observations of Flat Galaxies
• Yet another sample of RFGC galaxies
• Optical and HI properties of isolated galaxies in the 2MIG catalog. I. General relationships
• Distances and peculiar velocities of spiral galaxies in the 2MFGC and SFI++ samples
• Large-scale collective motion of RFGC galaxies in curved space-time
• Bulk Motions of Spiral Galaxies in the z = 0.03 Volume