食双星中第一颗类δ天蝎座脉动Ap星

IF 0.4 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2020-03-01 DOI:10.31577/caosp.2020.50.2.630

M. Skarka, P. Kabáth, E. Paunzen, M. Mašek, J. Žák, J. Janík

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引用次数: 0

摘要

HD99458最近被发现是第一个这样的天体:一个短周期的食双星拥有一颗有斑点的，化学上特殊的a型主星，它是一颗delta Scuti脉冲星，和一颗m矮星次级星。这些现象不应该同时存在。基于新的光度测量数据，我们发现先前公布的主脉动模式周期是开普勒采样给出的真实周期(0.036 d，而不是0.052 d)的奈奎斯特别名。

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

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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来源期刊

Contributions of the Astronomical Observatory Skalnate Pleso 地学天文-天文与天体物理

CiteScore

1.10

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： Contributions of the Astronomical Observatory Skalnate Pleso" (CAOSP) is published by the Astronomical Institute of the Slovak Academy of Sciences (SAS). The journal publishes new results of astronomical and astrophysical research, preferentially covering the fields of Interplanetary Matter, Stellar Astrophysics and Solar Physics. We publish regular papers, expert comments and review contributions.