On the first δ Scuti-like pulsating Ap star in an eclipsing binary
Abstract
HD 99458 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 δ 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.
- Publication:
-
Contributions of the Astronomical Observatory Skalnate Pleso
- Pub Date:
- March 2020
- DOI:
- 10.31577/caosp.2020.50.2.630
- Bibcode:
- 2020CoSka..50..630S
- Keywords:
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- Stars: HD 99458;
- Stars: chemically peculiar;
- binaries: eclipsing;
- Stars: pulsations