The bulk motion of flat edge-on galaxies based on 2MASS photometry

Free access article

Issue		A&A Volume 407, Number 3, September I 2003


Page(s)		889 - 898
Section		Galactic structure and dynamics
DOI		http://dx.doi.org/10.1051/0004-6361:20030857

A&A 407, 889-898 (2003)
DOI: 10.1051/0004-6361:20030857

The bulk motion of flat edge-on galaxies based on 2MASS photometry

Yu. N. Kudrya¹, V. E. Karachentseva¹, I. D. Karachentsev², S. N. Mitronova^{2, 3}, T. H. Jarrett⁴ and W. K. Huchtmeier⁵

¹ Astronomical Observatory of Kiev Taras Shevchenko National University, Observatorna str., 3, 04053 Kiev, Ukraine
² Special Astrophysical Observatory, Russian Academy of Sciences, N.Arkhyz, KChR, 369167, Russia
³ Isaac Newton Institute of Chile, SAO Branch, Russia
⁴ Infrared Processing and Analysis Center, Mail Stop 100-22, California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA 91125
⁵ Max-Planck - Institut für Radioastronomie, Auf dem Hügel 69, 53121, Bonn, Germany

(Received 11 February 2003/ Accepted 12 May 2003 )

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 $J, H, K_{\rm s}$ TF relations and find that Kron $J_{\rm fe}$ magnitudes show the smallest dispersion on the TF diagram. For the sample of 971 RFGC galaxies with $V_{\rm 3K} < 18\,000$ km s ^-1 we find a dispersion $\sigma_{\rm TF}=0.42\rm ^m$ and an amplitude of bulk flow $V= 199\pm61$ km s ^-1, directed towards $l=301\degr\pm18\degr, b=-2\degr\pm15\degr$ . 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.

Key words: galaxies: spiral -- galaxies: fundamental parameters

Offprint request: S. N. Mitronova, mit@luna.sao.ru

SIMBAD Objects

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.