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Observations of new candidate PMS $\delta$ Scuti stars

Published online by Cambridge University Press:  02 March 2005

S. Bernabei ,
V. Ripepi ,
M. Marconi ,
L. Terranegra ,
P. Ferrara ,
S. Marinoni ,
E. Schisano  and
F. Palla
S. Bernabei
Affiliation:
INAF - Osservatorio Astronomico di Bologna, email: stefano.bernabei@bo.astro.it
V. Ripepi
Affiliation:
INAF - Osservatorio Astronomico di Capodimonte - Napoli
M. Marconi
Affiliation:
INAF - Osservatorio Astronomico di Capodimonte - Napoli
L. Terranegra
Affiliation:
INAF - Osservatorio Astronomico di Capodimonte - Napoli
P. Ferrara
Affiliation:
Universita' Federico II - Napoli
S. Marinoni
Affiliation:
INAF - Osservatorio Astronomico di Bologna, email: stefano.bernabei@bo.astro.it
E. Schisano
Affiliation:
Universita' Federico II - Napoli
F. Palla
Affiliation:
INAF - Osservatorio Astrofisico di Arcetri - Firenze
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Abstract

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Among variable stars, $\delta$ Scuti are particularly interesting since they can pulsate in different evolutionary phases and are characterized by both radial and nonradial pulsation modes. Even if the majority of $\delta$ Scuti stars are in their Main Sequence (MS) or post-MS phases, there are growing evidences in the recent years about the presence of $\delta$ Scuti variables among stars which are still in their pre-MS phase (the so-called Herbig Ae-stars). Due to the small number of the known class members, the boundaries of Instability Strip are not well constrained. In this context, we present the preliminary results of a long term project to define these limits by enlarging the sample of PMS $\delta$ Scuti stars.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Stars: pre-Main-Sequencestars: oscillations (including pulsations)stars: variables: $\delta$ Scutistars: interiors
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS224 , July 2004 , pp. 812 - 817
Copyright
© 2004 International Astronomical Union