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The effects of binarity in driving CP phenomena

J. Budaj

astro-pharXiv:astro-ph/9805055

Abstract

A lot of evidence has recently accumulated that physical characteristics of CP stars (delta m1, Ca/Fe ratio, Li abundance, distribution of orbital periods, vsini, Delta (V1-G), magnetic field) depend on orbital period or eccentricity. Consequently, the "tidal mixing + stabilization" hypothesis has been formulated to account for such features and the "binarity x magnetism" hypothesis of Abt & Snowden (1973) was reanalyzed. We conclude that all mentioned characteristics and properties of CP stars, including even CP star magnetism, may be affected or governed by binarity.

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