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Variations of Ultra-Violet Lines for C, N, and O in the Ap Stars HD 18296 and HD 25823†

Published online by Cambridge University Press:  12 April 2016

Jean-François Gonzalez  and
Marie-Christine Artru
Jean-François Gonzalez
Affiliation:
Ecole Normale Supérieure de Lyon, Laboratoire de Physique, 46, allée d’ItalieF-69364 LYON Cedex 07, FRANCE
Marie-Christine Artru
Affiliation:
Ecole Normale Supérieure de Lyon, Laboratoire de Physique, 46, allée d’ItalieF-69364 LYON Cedex 07, FRANCE

Abstract

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From the rotational variation of UV resonance lines of carbon, nitrogen, and oxygen, we study the irregular distribution of these elements upon the surface of two magnetic Ap stars: HD 18296 (21 Per) and HD 25823 (41 Tau).

Type
III. Magnetic Versus Non-Magnetic Stars
Information
International Astronomical Union Colloquium , Volume 138: Peculiar versus Normal Phenomena in A-Type and Related Stars , 1993 , pp. 345 - 349
Copyright
Copyright © Astronomical Society of the Pacific 1993

Footnotes

†

Based on observations by the International Ultraviolet Explorer collected at the Villafranca Satellite Tracking Station of the European Space Agency.

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