ξ1 CMa: An Extremely Slowly Rotating Magnetic B0.7 IV Star
| Authors |
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| Publication date | 2015 |
| Journal | Proceedings of the International Astronomical Union |
| Event | New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry |
| Volume | Issue number | 9 | S307 |
| Pages (from-to) | 399-400 |
| Organisations |
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| Abstract |
We present our analysis of 6 years of ESPaDOnS spectropolarimetry of the magnetic β Cep star ξ1 CMa (B1 III). This high-precision magnetometry is consistent with a rotational period Prot > 40 yr. Absorption line profiles can be reproduced with a non-rotating model. We constrain R⋆, L⋆, and the stellar age via a Baade-Wesselink analysis. Spindown due to angular momentum loss via the magnetosphere predicts an extremely long rotational period if the magnetic dipole Bd > 6 kG, a strength also inferred by the best-fit sinusoids to the longitudinal magnetic field measurements BZ when phased with a 60-year Prot.
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| Document type | Article |
| Note | In Volume 9, S307 (June 2014) © 2015. - Part of Symposium: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry. |
| Language | English |
| Published at |
https://doi.org/10.1017/S1743921314007261
(Final published version)
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