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 galaxy bulk flows. For 1141 all-sky distributed flat RFGC galaxies we construct J, H, K_s TF relations and find that Kron Jfe magnitudes show the smallest dispersion on the TF diagram. For the sample of 971 RFGC galaxies with V_(3K) < 18000 km s^(-1) we find a dispersion σ_(TF) = 0.42^m and an amplitude of bulk flow V = 199 ± 61 km s^(-1), directed towards l = 301° ± 18°, b = -2° ± 15°. Our determination of low-amplitude coherent flow is in good agreement with a set of recent data derived from EFAR, PSCz and 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^(-1)) is seen towards the Pisces-Perseus supercluster, as well as the Hercules – Coma – Corona Borealis supercluster regions.
Additional Information
© 2003 ESO. Article published by EDP Sciences. Received 11 February 2003; Accepted 12 May 2003; Published online 17 November 2003. We thank Dmitry Makarov for help in the design of Figs. 4 and 5. This paper makes use of data from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. We have made use of the LEDA database (http://leda.univ-lyon1.fr). This research was partially supported by DFG-RFBR grant 436RUS 113/701/0-1.Attached Files
Published - aa3582.pdf
Accepted Version - 0305483.pdf
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Additional details
- Eprint ID
- 84982
- Resolver ID
- CaltechAUTHORS:20180228-073207490
- NASA
- NSF
- 436RUS 113/701/0-1
- Deutsche Forschungsgemeinschaft (DFG)
- Russian Foundation for Basic Research
- Created
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2018-02-28Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)