In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no. 2
T. Lüftinger - O. Kochukhov - T. Ryabchikova - N. Piskunov - W.w. Weiss - I. Ilyin
Detaily:
Rok, strany: 2008, 335 - 340
Kľúčové slová:
stars: chemically peculiar, stars: magnetic fields, methods: numerical, techniques: polarimetric, stars: individual: HD 24712
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2008/Vol_38/No_2/pp335-340_abstract.html
O článku:
The first analysis of the structure of the surface magnetic field of a rapidly
oscillating Ap (roAp) star is presented.
We obtain information about abundance distributions of a number of chemical
elements on the surface of the prototypical
roAp star HD 24712 and about magnetic field geometry.
Inverting rotationally modulated spectra in Stokes parameters I and
V
obtained with the SOFIN spectropolarimeter attached to
the NOT, we recover surface abundance structures of sixteen
different chemical elements, including Mg, Ca, Sc, Ti, Cr, Fe, Co, Ni, Y, La,
Ce, Pr, Nd, Gd, Tb, and Dy.
Our analysis reveal a pure dipolar structure of the stellar magnetic field
and surprising and unexpected correlations of the various elemental surface
abundance structures to this field geometry.
Stratification analysis at phases of both magnetic extrema enable us to
obtain the vertical dimension in the atmosphere of HD 24712. High time
resolved spectroscopic data and observations obtained with the MOST space
photometer give us the possibility to
compare (Lüftinger, 2007) our results to detailed pulsational analysis.
Ako citovať:
ISO 690:
Lüftinger, T., Kochukhov, O., Ryabchikova, T., Piskunov, N., Weiss, W., Ilyin, I. 2008. 3D atmospheric structure of the prototypical roAp star HD 24712 (HR1217). In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no.2, pp. 335-340. 1335-1842.
APA:
Lüftinger, T., Kochukhov, O., Ryabchikova, T., Piskunov, N., Weiss, W., Ilyin, I. (2008). 3D atmospheric structure of the prototypical roAp star HD 24712 (HR1217). Contributions of the Astronomical Observatory Skalnaté Pleso, 38(2), 335-340. 1335-1842.