Hostname: page-component-848d4c4894-v5vhk Total loading time: 0 Render date: 2024-06-18T23:11:28.816Z Has data issue: false hasContentIssue false
  • English
  • Français

Asteroseismology and Forced Oscillations of the Simultaneous p-Mode and g-Mode Pulsator HD 209295

Published online by Cambridge University Press:  12 April 2016

G. Handler ,
L.A. Balona ,
R.R. Shobbrook ,
C. Koen ,
A. Bruch ,
E. Romero-Colmenero ,
A.A. Pamyatnykh ,
B. Willems ,
L. Eyer  and
D.J. James
...Show all authors
G. Handler
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, South Africa
L.A. Balona
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, South Africa
R.R. Shobbrook
Affiliation:
P.O. Box 518, Coonabarabran, N.S.W 2357, Australia Research School of Astronomy and Astrophysics, Australian National University, Weston Creek P.O., ACT 2611, Australia
C. Koen
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, South Africa
A. Bruch
Affiliation:
Labóratorio Nacional de Astrofísica, Itajubá, Brazil
E. Romero-Colmenero
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, South Africa
A.A. Pamyatnykh
Affiliation:
Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland
B. Willems
Affiliation:
Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6 A A, UK
L. Eyer
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium Astrophysical Sciences Dept., Princeton University, Princeton, New Jersey 08544, USA
D.J. James
Affiliation:
Observatoire de Genève, Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland Laboratoire d’Astrophysique, Observatoire de Grenoble, Université Joseph Fourier, B.P. 53, F-38041, Grenoble Cedex 9, France School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews, FIFE, KY16 9SS, United Kingdom 475 N. Charter Street, 5534 Sterling Hall, Madison, WI 53706-1582, USA
T. Maas
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
L.A. Crause
Affiliation:
Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We report the discovery of both intermediate-order gravity mode and low-order pressure mode pulsation in the same star, HD 209295. It is therefore both a γ Doradus and a δ Scuti star, which makes it the first confirmed member of two classes of pulsating star.

This object is located in a close binary system with an unknown, but likely degenerate companion in an eccentric orbit, and some of the γ Doradus pulsation frequencies are exact integer multiples of the orbital frequency. We suggest that these pulsations are tidally excited. HD 209295 may be the progenitor of an intermediate-mass X-Ray binary.

Type
Part 1.2. Pulsations in Close Binaries
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 90 - 93
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Aerts, C. & Krisciunas, K. 1996, MNRAS, 278, 877 Google Scholar
Balona, L.A. & Evers, E.A. 1999, MNRAS, 302, 349 CrossRefGoogle Scholar
ESA, 1997, The Hipparcos and Tycho catalogues, (ESA SP-1200)Google Scholar
Handler, G. 1999, MNRAS, 309, L19 CrossRefGoogle Scholar
Handler, G. & Shobbrook, R.R. 2002, MNRAS, in preparationGoogle Scholar
Koen, C., Van Rooyen, R., Van Wyk, F., & Marang, F. 1999, MNRAS, 309, 1051 CrossRefGoogle Scholar
Kumar, R, Ao, C.O., & Quataert, E.J. 1995, ApJ, 449, 294 CrossRefGoogle Scholar
Kosovichev, A.G. & Severnyj, A.B. 1983, Pis’ma v Astronomicheskii Zhurnal, 9, 424 Google Scholar
Telting, J.H. & Schrijvers, C. 1997, A&A, 317, 723 Google Scholar