Multiple, short-lived "stellar prominences" on the O giant ξ Persei: a magnetic star?

In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 48, no. 1

N. Sudnik - H.f. Henrichs

Detaily:

Rok, strany: 2018, 305 - 306

Kľúčové slová:

stars: early-type, stars: individual: ξ Persei, stars: magnetic field, stars: winds, outflows, stars: rotation

URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2018/Vol_48/No_1/pp305-306_abstract.html

Full text

O článku:

We present strong evidence for a rotation period of 2.0406 d of the O giant ξ Persei, derived from the N_IV 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 He_II 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.

Ako citovať:

ISO 690:

Sudnik, N., Henrichs, H. 2018. Multiple, short-lived "stellar prominences" on the O giant ξ Persei: a magnetic star?. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 48, no.1, pp. 305-306. 1335-1842.

APA:

Sudnik, N., Henrichs, H. (2018). Multiple, short-lived "stellar prominences" on the O giant ξ Persei: a magnetic star?. Contributions of the Astronomical Observatory Skalnaté Pleso, 48(1), 305-306. 1335-1842.