Volume 434, Number 3, May II 2005
|Page(s)||1063 - 1068|
|Section||Stellar structure and evolution|
|Published online||18 April 2005|
Detection of a classical δ Scuti star in the new eclipsing binary system HIP 7666
Grup d'Estudis Astronòmics, Apdo. 9481, 08080 Barcelona, Spain e-mail: email@example.com
2 Koninklijke Sterrenwacht van België, Ringlaan 3, 1180 Brussel, Belgium e-mail: firstname.lastname@example.org
3 Esteve Duran Observatory Foundation, Montseny 46 – Urb. El Montanya, 08553 Seva, Spain e-mail: email@example.com
4 Vereniging Voor Sterrenkunde, Belgium e-mail: firstname.lastname@example.org
Accepted: 15 December 2004
HIP 7666 is a variable star newly discovered during the Hipparcos mission and classified as of unknown type (ESA 1997, The Hipparcos and Tycho Catalogues, ESA SP-1200). During 23 nights between July 2000 and November 2000, over 2300 CCD observations in the V band were obtained. These data show that the new variable is a detached eclipsing binary system with an orbital period of 2.37229 days. In addition, one of the components undergoes very short-period oscillations with a main pulsation frequency of 24.46 or 25.47 c/d. HIP 7666 is therefore a new member of the rare group of detached eclipsing binary systems with a δ Scuti type component.
Key words: stars: binaries: eclipsing / stars: oscillations / stars: variables: δ Sct / stars: individual: HIP 7666
© ESO, 2005
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