On the first delta Scuti-like pulsating Ap star in an eclipsing binary

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Authors

SKARKA Marek KABÁTH Petr PAUNZEN Ernst MAŠEK Martin ŽÁK Jiří JANÍK Jan

Year of publication 2020
Type Article in Periodical
Magazine / Source Contributions of the Astronomical Observatory Skalnaté Pleso
MU Faculty or unit

Faculty of Science

Citation
Web http://www.astro.sk/caosp/Eedition/Abstracts/2020/Vol_50/No_2/pp630-631_abstract.html
Doi http://dx.doi.org/10.31577/caosp.2020.50.2.630
Keywords Stars: HD99458; Stars: chemically peculiar; binaries: eclipsing; Stars: pulsations
Description HD99458 was recently discovered to be a first object of its kind: a short-period eclipsing binary hosts a spotted, chemically peculiar A-type primary star that is a delta Scuti pulsator, and an M-dwarf secondary. These phenomena should not co-exist at the same time. Based on new photometric data we find that the previously published period of the main pulsation mode is a Nyquist alias of the true period (0.036 d, and not 0.052 d) given by the Kepler sampling.
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