A catalog of rotational and radial velocitiesfor evolved stars
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...
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Published in | Astronomy and astrophysics (Berlin) Vol. 458; no. 3; pp. 895 - 898 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
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EDP Sciences
01.11.2006
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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. |
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AbstractList | 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. |
Author | De Medeiros, J. R. Melo, C. do Nascimento Jr, J. D. Canto Martins, B. L. Silva, J. R. P. da Silva, L. Burnet, M. |
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SubjectTerms | stars: evolution stars: fundamental parameters stars: Population II stars: rotation stars: statistics |
Title | A catalog of rotational and radial velocitiesfor evolved stars |
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