Radii and space orientation of the rotational axes of AP stars

Details Radii and space orientation of the rotational axes of AP stars Radii and space orientation of the rotational axes of AP stars

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220..105s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 105-111. Research supported by the Polska Akademia

Astronomy and Astrophysics

Astrophysics

17

A Stars, Peculiar Stars, Radii, Stellar Rotation, Axes Of Rotation, Diameters

Scientific paper

The inclination of the rotation axis to the line of sight (i) has been determined for a carefully selected sample of Ap stars with reliable values of periods of rotation, and values of the stellar radius (R) times sin i have been compared with values of normal main-sequence stars. The findings that none of the obtained R x sin i values are significantly larger than the upper limit for the radius of a main sequence stars and that the mean radius of Ap stars is close to the normal main sequence value suggest that most Ap stars are main-sequence objects. The observed i distribution implies that the distribution of the rotational axes of Ap stars in space is random.

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