The distribution of rotational velocity for evolved stars.

Details The distribution of rotational velocity for evolved stars. The distribution of rotational velocity for evolved stars.

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...314..499d&link_type=abstract

Astronomy and Astrophysics, v.314, p.499-502

Statistics

40

Stars: Fundamental Parameters, Stars: Rotation, Stars: Statistics

Scientific paper

In this work we present the distribution of the projected rotational velocity Vsini for evolved stars of luminosity classes IV, III and II. Such distribution is studied as a function of the color index and the spectral type for a large sample of about 1600 stars, with spectral types ranging from middle F to middle K, complete to magnitude 6.5. We show essentially that F giant stars present a broad distribution of Vsini values, whereas G and K giants present strikingly similar distributions reaching a maximum at very low values and decreasing abruptly with increasing Vsini values. The mean rotational velocity is given as a function of the color index and spectral type.

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