Issue |
A&A
Volume 440, Number 2, September III 2005
|
|
---|---|---|
Page(s) | 711 - 714 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20053549 | |
Published online | 01 September 2005 |
HD 172189: an eclipsing and spectroscopic binary with a δ Sct-type pulsating component in an open cluster
1
Instituto de Astrofísica de Andalucía, CSIC, Apdo. 3004, 18080 Granada, Spain e-mail: susana@iaa.es
2
European Southern Observatory, Alonso de Cordova 3107, Santiago 19, Chile
3
LESIA, Observatoire de Paris-Meudon, 92195 Meudon Principal Cedex, France
4
Instituto de Astronomía, Universidad Nacional Autónoma de Mexico, Apdo. Postal 70-264, 04510 Mexico DF, Mexico
5
Institut d'Estudis Espacials de Catalunya/CSIC, Campus UAB, Facultat de Ciències, Torre C5-parell-2a planta, 08193 Bellaterra, Spain
6
INAF – Osservatorio Astronomico di Brera, via Bianchi 46, 23807 Merate (LC), Italy
Received:
25
April
2005
Accepted:
1
June
2005
We present a study based on more than 2500 uvby-measurements collected on HD 172189, a new eclipsing binary system with a δ Sct-type pulsating component that belongs to the open cluster IC 4756. The great interest of this object lies in that three important characteristics coexist: cluster membership, binarity and pulsation. Its binarity and the δ Sct-type pulsations of one component were detected in the course of several Strömgren photometric campaigns. The frequency analysis of all the uvby out-of-eclipse data reveals a clear frequency of 19.5974 cd-1as well as the existence of other high values in the range 18–20 cd-1. We have also carried out a first evaluation of the binary parameters and determined a value of 5.702 d for the orbital period. An additional potential interest of HD 172189 resides in its location in the field of view of the COROT mission and, therefore, this star is an excellent candidate for becoming a target for asteroseismology.
Key words: stars: binaries: eclipsing / stars: oscillations / stars: variables: δ Sct / Galaxy: open clusters and association: IC 4756
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.