Astron. Astrophys. 339, 531-536 (1998)

Stellar atmospheric parameters for the giant stars µ Pegasi and Pegasi

G. Smith

Department of Physics, Nuclear and Astrophysics Laboratory, Keble Road, Oxford OX1 3RH, UK

Received 3 August 1998 / Accepted 27 August 1998

Abstract

Profiles of the strong lines Ca II 8542 Å and Mg I 8806 Å together with regions containing Ca I, Fe I and Fe II lines in the spectra of the G8 giant stars µ Peg and Peg have been recorded at high resolution and with signal/noise . The wings of the strong lines and the full profiles of intermediate strength lines are consistent with an LTE analysis based on the following sets of atmospheric parameters:

These results, together with Hipparcos parallaxes and recently published photometry, lead to estimates of luminosity, mass and radius. Inferred angular diameters are consistent with a well established empirical relationship but disagree with direct measurements by an interferometric technique.

Key words: stars: fundamental parameters stars: individual: Peg stars: individual: Peg

Send offprint requests to: G. Smith

© European Southern Observatory (ESO) 1998

Online publication: October 21, 1998

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