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Magnetic-field dependence of chemical anomalies in CP stars

Magnetic-field dependence of chemical anomalies in CP stars The dependence of the degree of anomaly of parameter Z of Geneva photometry (Z0 = Z CP ℒZ norm.) on the average surface magnetic field Bs is analyzed. The Z0 value is proportional to the degree of anomaly of chemical composition. It was found that Bs → 0 corresponds Z0 → −0.010÷ −0.015, i.e., part of CP stars are virtually devoid of magnetic field, but exhibit chemical anomalies. This effect may be due to selection whereby only objects with strong chemical anomalies are classified as CP stars, thereby producing a deficit of stars with relatively weak anomalies. Moreover, CP stars have other sources of stabilization of their atmospheres besides the magnetic field, e.g., slow rotation. Formulas relating Z0 to Bs are derived. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Astrophysical Bulletin Springer Journals

Magnetic-field dependence of chemical anomalies in CP stars

Glagolevskij, Yu.
Astrophysical Bulletin , Volume 62 (3) – Sep 5, 2007
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References (9)

Publisher
Springer Journals
Copyright
Copyright © 2007 by Pleiades Publishing, Ltd.
Subject
Physics; Astronomy, Astrophysics and Cosmology
ISSN
1990-3413
eISSN
1990-3421
DOI
10.1134/S1990341307030054
Publisher site
See Article on Publisher Site

Abstract

The dependence of the degree of anomaly of parameter Z of Geneva photometry (Z0 = Z CP ℒZ norm.) on the average surface magnetic field Bs is analyzed. The Z0 value is proportional to the degree of anomaly of chemical composition. It was found that Bs → 0 corresponds Z0 → −0.010÷ −0.015, i.e., part of CP stars are virtually devoid of magnetic field, but exhibit chemical anomalies. This effect may be due to selection whereby only objects with strong chemical anomalies are classified as CP stars, thereby producing a deficit of stars with relatively weak anomalies. Moreover, CP stars have other sources of stabilization of their atmospheres besides the magnetic field, e.g., slow rotation. Formulas relating Z0 to Bs are derived.

Journal

Astrophysical Bulletin – Springer Journals

Published: Sep 5, 2007

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