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Asteroseismology of δ Scuti Stars: Observations

Published online by Cambridge University Press:  08 February 2017

Michel Breger
Michel Breger*
Affiliation:
Institut für Astronomie, Türkenschanzstr. 17, A-1180 Wien, Austria

Abstract

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We review recent observational developments which provide important asteroseismological tools. Extensive multisite campaigns of individual δ Scuti stars show that 24 or more pulsation modes with ℓ = 0 to 2 can be detected photometrically. Spectroscopically, also about 30 modes have been detected, and these can be identified with modes of ℓ values up to 20. Since each technique favors the detection of specific types of modes, hundreds or thousands of modes must be excited in δ Scuti stars.

We examine the quantities which can be matched between observations and theoretical models specifically computed for each star. Recent progress in tbe mode identification of multiple pulsation modes is illustrated by presenting an application of the phase shift method for the two stars, FG Vir and 4 CVn, recently measured by the Delta Scuti Network.

Type
VI. Asteroseismology II
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 323 - 330
Copyright
Copyright © Kluwer 1998 

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