EDP Sciences
Free access
Issue A&A
Volume 458, Number 3, November II 2006
Page(s) 895 - 898
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20065642



A&A 458, 895-898 (2006)
DOI: 10.1051/0004-6361:20065642

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
    e-mail: renan@dfte.ufrn.br
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)

Abstract
Aims.The present paper describes the first results of an observational program intended to refine and extend the existing $v \sin i$ 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 $v \sin i$ measurements, obtained from spectral synthesis, we estimate an uncertainty of about 2.0  ${\rm km\,s}^{-1}$.
Results.Precise rotational velocities $v \sin i$ 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

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Editor-in-Chief: T. Forveille
Letters Editor-in-Chief: J. Alves
Managing Editor: N. Aghanim

ISSN: 0004-6361 ; e-ISSN: 1432-0746
Frequency: 12 volumes per year
Published by: EDP Sciences

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