Issue |
A&A
Volume 465, Number 1, April I 2007
|
|
---|---|---|
Page(s) | 71 - 85 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20066187 | |
Published online | 19 December 2006 |
Kinematics of the Local Universe*
XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation, and preliminary maps of the peculiar velocity field
1
LPCE/CNRS UMR6115, 3A Av. de la recherche scientifique, 45071 Orléans Cedex 02, France e-mail: theureau@cnrs-orleans.fr
2
Observatoire de Paris/Meudon, GEPI/CNRS URA1757, 92195 Meudon Principal Cedex, France
3
Tuorla observatory, University of Turku, 21500 Piikkiö, Finland
Received:
4
August
2006
Accepted:
3
November
2006
Aims.This paper presents 452 new 21-cm neutral hydrogen line measurements carried out with the FORT receiver of the meridian transit Nançay radiotelescope (NRT) in the period April 2003–March 2005.
Methods.
This observational programme is part of a larger project aiming at
an exhaustive and magnitude-complete HI extragalactic
catalogue for Tully-Fisher applications (the so-called KLUN project,
for Kinematics of the Local Universe studies, to end in 2008).
The whole on-line HI archive of the NRT today contains reduced HI-profiles for 4500 spiral galaxies of declination (http://klun.obs-nancay.fr).
Results.As an example of this application, we used the direct Tully-Fisher relation in three (JHK) bands in deriving distances to a large catalogue of 3126 spiral galaxies distributed through the whole sky and sampling the radial velocity range well between 0 and 8000 km s-1. Thanks to an iterative method accounting for selection bias and smoothing effects, we show a detailed and original map of the velocity field in the Local Universe as a preliminary output.
Key words: astronomical data bases: miscellaneous / surveys / galaxies: kinematics and dynamics / radio lines: galaxies
© ESO, 2007
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