HYPERLEDA

Free access article

Issue		A&A Volume 412, Number 1, December II 2003


Page(s)		57 - 67
Section		Galactic structure and dynamics
DOI		http://dx.doi.org/10.1051/0004-6361:20031412

A&A 412, 57-67 (2003)
DOI: 10.1051/0004-6361:20031412

II. The homogenized HI data

G. Paturel¹, G. Theureau^{2, 3}, L. Bottinelli^{2, 4}, L. Gouguenheim^{2, 4}, N. Coudreau-Durand², N. Hallet² and C. Petit¹

¹ Observatoire de Lyon, avenue Charles-André, 69561 Saint-Genis Laval Cedex, France
² LPCE, CNRS-Orléans, 3A avenue de la recherche scientifique, 45071 Orléans Cedex 02, France
³ Observatoire de Paris-Meudon, GEPI, 5 place Jules Janssen, 92195 Meudon Cedex, France
⁴ Université Paris-Sud, Bât. 470, 15 rue Georges Clémenceau, 91405 Orsay Cedex, France

(Received 25 March 2003 / Accepted 29 July 2003 )

Abstract
After a compilation of HI data from 611 references and new observations made in Nançay, we produce a catalog of homogenized HI data for 16781 galaxies. The homogenization is made using the EPIDEMIC method from which all data are progressively converted into the adopted standard. The result is a catalog giving: 1) the logarithm of twice the maximum rotation velocity, $\log 2V_{\rm M}^{\sin i}$ , converted to the system of Mathewson et al. (1996). This quantity is given without correction for inclination; 2) the HI magnitude, m₂₁, (area of the 21-cm line width expressed in magnitude) converted to the flux system of Theureau et al. (1998); 3) the HI velocity, $V_{\rm HI}$ , expressed with the optical definition (i.e., using wavelengths instead frequencies). The typical uncertainties are: 0.04 for $\log 2V_{\rm M}^{\sin i}$ , 0.25 mag for m₂₁ and 9 km s ^-1 for $V_{\rm HI}$ .

Key words: galaxies: general -- catalogs

Offprint request: G. Paturel, patu@obs.univ-lyon1.fr

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