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Cluster Distances using Delta Scuti Stars; The Open Clusters Praesepe and NGC 7062

Published online by Cambridge University Press:  03 August 2017

Torben Arentoft  and
Lars M. Freyhammer
Torben Arentoft
Affiliation:
University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
Lars M. Freyhammer
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussels, Belgium University of Brussels (VUB), Pleinlaan 2, B-1050 Brussels, Belgium

Abstract

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Asteroseismology of multiperiodic δ Scuti stars is a powerful tool for providing estimates of distances to the stars being analyzed. Especially δ Scuti stars in clusters offer good possibilities for determining asteroseismic distances, as the stellar models are constrained by assuming common values for chemical composition, age and distance. Recently, we detected a large population of δ Scuti stars in the open cluster NGC 7062. On the basis of these results, we discuss the potential of extending the asteroseismic distance scale for δ Scuti stars to include extra-galactic stellar clusters. Especially high-amplitude δ Scuti stars, pulsating in at least 2 radial modes, offer promising possibilities for doing this.

Type
Part 1. The Star Clusters of Local Group Galaxies
Information
Symposium - International Astronomical Union , Volume 207: Extragalactic Star Clusters , 2002 , pp. 135 - 137
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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