Multiple, short-lived "stellar prominences" on the O giant ξ Persei a magnetic star?
| Authors |
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| Publication date | 01-2018 |
| Journal | Contributions of the Astronomical Observatory Skalnaté Pleso |
| Event | Stars with a stable magnetic field: from pre-main sequence to compact remnants |
| Volume | Issue number | 48 | 1 |
| Pages (from-to) | 305-306 |
| Organisations |
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| Abstract |
We present strong evidence for a rotation period of 2.0406 d of the O giant ξ Persei, derived from the NIV λ1718 wind line in 12 yr of IUE data. We predict that ξ Per has a magnetic dipole field, with superposed variable magnetic prominences. Favorable dates for future magnetic measurements can be predicted. We also analysed time-resolved HeII 4686 spectra from a campaign in 1989 by using the same simplified model as before for λ Cephei, in terms of multiple spherical blobs attached to the surface, called stellar prominences (Sudnik & Henrichs, 2016). These represent transient multiple magnetic loops on the surface, for which we find lifetimes of mostly less than 5 h.
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| Document type | Article |
| Language | English |
| Published at | http://www.astro.sk/caosp/Eedition/Abstracts/2018/Vol_48/No_1/pp305-306_abstract.html |
| Other links | https://ui.adsabs.harvard.edu/abs/2018CoSka..48..305S/abstract |
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Multiple, short-lived stellar prominences
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