A catalog of rotational and radial velocitiesfor evolved stars

• Published in: Astronomy and astrophysics (Berlin) Vol. 458; no. 3; pp. 895 - 898
• Main Authors: De Medeiros, J. R., Silva, J. R. P., do Nascimento Jr, J. D., Canto Martins, B. L., da Silva, L., Melo, C., Burnet, M.
• Format: Journal Article
• Language: English
• Published: EDP Sciences 01.11.2006
• Subjects: stars: evolution; stars: fundamental parameters; stars: Population II; stars: rotation; stars: statistics
• ISSN: 0004-6361; 1432-0746
• DOI: 10.1051/0004-6361:20065642

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.