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The Photospheric Abundances of Active Binaries: First Results

Published online by Cambridge University Press:  26 May 2016

T. Morel ,
G. Micela ,
F. Favata ,
D. Katz  and
I. Pillitteri
T. Morel
Affiliation:
INAF, Osservatorio Astronomico di Palermo G. S. Vaiana, Italy
G. Micela
Affiliation:
INAF, Osservatorio Astronomico di Palermo G. S. Vaiana, Italy
F. Favata
Affiliation:
Astrophysics Division ESA, ESTEC, Noordwijk, The Netherlands
D. Katz
Affiliation:
Observatoire de Paris, GEPI, Place Jules Janssen, Meudon, France
I. Pillitteri
Affiliation:
Università di Palermo, Italy

Abstract

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Photospheric parameters and abundances of 13 chemical species are presented for a sample of single-lined chromospherically active binaries from a differential LTE analysis of high-resolution spectra. Our results indicate that the X-ray active binaries studied are not as metal poor as previously claimed, but are at most mildly iron-depleted relative to the Sun (—0.41 ≲ [Fe/H] ≲ +0.11). A significant overabundance of several elements (e.g., Na, Mg, Al, Ca) is observed. The temperatures derived from the (V — R) and (V — I) colours are found to be significantly affected by activity processes.

Type
Part 5: Stellar Magnetic Activity and Evolution
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 259 - 263
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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