Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...165..110b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 165, no. 1-2, Sept. 1986, p. 110-119.
Astronomy and Astrophysics
Astrophysics
171
Stellar Evolution, Stellar Rotation, T Tauri Stars, Angular Velocity, Astronomical Photometry, K Stars, Late Stars, Pleiades Cluster, Pre-Main Sequence Stars
Scientific paper
The authors obtained rotational velocities for 28 T Tauri stars down to a resolution limit of a few km s-1. They find that the distribution of rotational velocities for low-mass T Tauri stars (M < 1.25 M_sun;) is narrow and well-peaked around 15 km s-1 whereas high-mass T Tauri stars have rotational velocities covering a range from 15 to 75 km s-1. Comparison between the rotational velocity distribution of low-mass T Tauri stars and of main-sequence Pleiades K-stars supports the hypothesis that pre-main-sequence low-mass stars spin up on their radiative evolutionary tracks during contraction toward the main-sequence. The lack of very slow rotators (v sin i ≤ 6 km s-1) among the authors' sample of T Tauri stars suggests that a minimum rotational velocity may be necessary for the T Tauri phenomenon to turn-on.
Benz Willy
Bertout Claude
Bouvier Jerome
Mayor Marcel
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