A&A 458, 895-898 (2006)
A catalog of rotational and radial velocities for evolved stars
IV. Metal-poor stars,J. R. De Medeiros1, J. R. P. Silva2, J. D. do Nascimento Jr1, B. L. Canto Martins1, L. da Silva1, 3, C. Melo4, 5 and M. Burnet6
1 Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, Brazil
2 Universidade Estadual do Rio Grande do Norte, Mossoró, RN, Brasil
3 Observatório Nacional, RJ, Brazil
4 European Southern Observatory, La Silla, Chile
5 Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
6 Observatoire de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland
(Received 19 May 2006 / Accepted 20 July 2006)
Aims.The present paper describes the first results of an observational program intended to refine and extend the existing measurements of metal-poor stars, with an emphasis on field evolved stars.
Methods.The survey was carried out with the FEROS and CORALIE spectrometers. For the measurements, obtained from spectral synthesis, we estimate an uncertainty of about 2.0 .
Results.Precise rotational velocities are presented for a large sample of 100 metal-poor stars, most of them evolving off the main-sequence. For the large majority of the stars composing the present sample, rotational velocities have been measured for the first time.
Key words: catalogs -- stars: evolution -- stars: fundamental parameters -- stars: Population II -- stars: rotation -- stars: statistics
© ESO 2006