Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..401h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. 401-410.
Astronomy and Astrophysics
Astrophysics
2
A Stars, Peculiar Stars, Radii, Statistical Analysis, Stellar Rotation, Stellar Spectra, Angular Momentum, Correlation, Stellar Radiation, Stellar Temperature
Scientific paper
Apparent rotational velocities and rotation periods for CP 2 stars are used to study the 'apparent' radius distribution of R sin i. It implies a distribution for the radii of CP 2 stars which is almost normal for their temperatures when compared to main sequence stars. However, a statistical correlation exists between rotation period P and R sin i. It is argued that, at least in the case of silicon stars, neither conservation of angular momentum on the main sequence, nor bias in the measured v sin i values are able to induce a correlation of the observed strength. Thus, one has to postulate either additional rotational braking depending statistically on R, or a detection bias depending statistically on i. It is shown that the correlation might be explained in both ways and the implications of each possibility are discussed.
Blomme Ronny
Hensberge Herman
van Rensbergen Walter
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