Volume 405, Number 1, July I 2003
|Page(s)||231 - 236|
|Section||Stellar structure and evolution|
|Published online||16 June 2003|
Search for A–F Spectral type pulsating components in Algol-type eclipsing binary systems*
Korea Astronomy Observatory, Daejeon, 305-348, Korea
2 Department of Astronomy and Space Science, Chungbuk National University, Cheongju, 361-763, Korea
3 Astronomical Observatory, Odessa National University, Shevchenko Park, Odessa, 65014, Ukraine
4 Astrophysical Research Center for the Structure and Evolution of the Cosmos, Sejong University, Seoul, 143-747, Korea
5 Department of Earth Science Education, Chonbuk National University, Chonju, 561-756, Korea
Corresponding author: S.-L. Kim, firstname.lastname@example.org
Accepted: 2 April 2003
We present the results of a systematic search for pulsating components in Algol-type eclipsing binary systems. A total number of 14 eclipsing binaries with A–F spectral type primary components were observed for 22 nights. We confirmed small-amplitude oscillating features of a recently detected pulsator TW Dra, which has a pulsating period of 0.053 day and a semi-amplitude of about 5 mmag in B-passband. We discovered new pulsating components in two eclipsing binaries of RX Hya and AB Per. The primary component of RX Hya is pulsating with a dominant period of 0.052 day and a semi-amplitude of about 7 mmag. AB Per has also a pulsating component with a period of 0.196 day and a semi-amplitude of about 10 mmag in B-passband. We suggest that these two new pulsators are members of the newly introduced group of mass-accreting pulsating stars in semi-detached Algol-type eclipsing binary systems.
Key words: stars: binaries: eclipsing / stars: variables: δ Sct / stars: individual: TW Dra, RX Hya, AB Per
© ESO, 2003
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