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arXiv · 1712.02624

Evolving pulsation of the slowly rotating magnetic beta Cep star xi 1 CMa

Sean B. Begy·Gregg A. Wade·Gerald Handler·Andrzej Pigulski·James Sikora·Matt Shultz
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Abstract

We report BRITE-Constellation photometry of the beta Cep pulsator xi 1 CMa. Analysis of these data reveals a single pulsation period of 0.2095781(3) d, along with its first and second harmonics. We find no evidence for any other frequencies, limiting the value of this star as a target for magneto-asteroseismology. We em- ploy the 17-year database of RV measurements of xi 1 CMa to evaluate evidence for the reported change in pulsation period, and interpret this period change in terms of stellar evolution. We measure a rate-of-change of the period equal to 0.009(1) s/yr, consistent with that reported in the literature.

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Sean B. Begy, Gregg A. Wade, Gerald Handler, Andrzej Pigulski, James Sikora, Matt Shultz. 2017-12-07. Evolving pulsation of the slowly rotating magnetic beta Cep star xi 1 CMa. https://arxiv.org/abs/1712.02624

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