Rotation in the ZAMS: Be and Bn stars
J. Zorec, Y. Frémat, C. Martayan, L. Cidale, A. Torres
Abstract
We show that Be stars belong to a high velocity tail of a single B-type star rotational velocity distribution in the MS. This implies that: 1) the number fraction N(Be)/N(Be+B) is independent of the mass; 2) Bn stars having ZAMS rotational velocities higher than a given limit might become Be stars.
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