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Pulsation of the $\delta$ Scuti multiple system DG Leo

Published online by Cambridge University Press:  02 March 2005

P. Lampens ,
Y. Frémat ,
R. Garrido ,
J.H. Peña ,
L. Parrao ,
P. Van Cauteren ,
J. Cuypers ,
P. De Cat ,
H. Hensberge  and
T. Arentoft
...Show all authors
P. Lampens
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, Belgium
Y. Frémat
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, Belgium
R. Garrido
Affiliation:
Instituto de Astrofísica de Andalucía Camino Bajo de Huetor 24, 18008 Granada, España
J.H. Peña
Affiliation:
Instituto de Astronomía, UNAM Apartado Postal 70-264 México 04510, D.F.
L. Parrao
Affiliation:
Instituto de Astronomía, UNAM Apartado Postal 70-264 México 04510, D.F.
P. Van Cauteren
Affiliation:
Beersel Hills Observatory, Laarheidestraat 166, B-1650 Beersel, Belgium
J. Cuypers
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, Belgium
P. De Cat
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, Belgium
H. Hensberge
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, Belgium
T. Arentoft
Affiliation:
Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C., Denmark
P. Mathias
Affiliation:
Observatoire de la Côte d'Azur, UMR 6528, F-06304 Nice Cedex 4, France
M. Hobart
Affiliation:
Facultad de Fisica, Universidad Veracruzana, A. Postal 270, Xalapa, Veracruz, Mexico
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Abstract

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DG Leo is a spectroscopic triple system showing $\delta$ Scuti type photometric and spectroscopic variations. The three components have nearly equal masses but different chemical compositions in the outer layers. All three are potential pulsators. Frequency analyses of the photometric data were carried out using various methods. These global results together with those of the spectroscopic analysis permit us to discuss of the behaviour of each component with respect to pulsation.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Binaries: spectroscopicstars: variable: $\delta$ Sctstars: individual: (DG Leo)stars: oscillations (including pulsations)

Information

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS224 , July 2004 , pp. 835 - 839
Copyright
© 2004 International Astronomical Union