In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no. 2
O. Kochukhov
Detaily:
Rok, strany: 2008, 191 - 200
Kľúčové slová:
stars: abundances, stars: atmospheres, stars: chemically peculiar, stars: magnetic fields, stars: starspots
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2008/Vol_38/No_2/pp191-200_abstract.html
O článku:
New observational techniques and sophisticated modelling methods have led to
dramatic breakthroughs in our understanding of the interplay between the surface
magnetism, atomic diffusion and atmospheric dynamics in chemically peculiar
stars. Magnetic Doppler images, constructed using spectropolarimetric
observations of Ap stars in all four Stokes parameters,
reveal the presence of small-scale field topologies.
Abundance Doppler mapping has been perfected to the level where
distributions of many different chemical elements can be deduced self-consistently
for one star.
The inferred chemical spot structures are diverse and do
not always trace underlying magnetic field geometry. Moreover, horizontal chemical
inhomogeneities are discovered in non-magnetic CP stars and evolving chemical
spots are observed for the first time in the bright mercury-manganese
star α And. These results show that in addition to magnetic fields,
another important non-magnetic structure formation mechanism acts in CP
stars.
Ako citovať:
ISO 690:
Kochukhov, O. 2008. Magnetic fields, spots and weather in chemically peculiar stars. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no.2, pp. 191-200. 1335-1842.
APA:
Kochukhov, O. (2008). Magnetic fields, spots and weather in chemically peculiar stars. Contributions of the Astronomical Observatory Skalnaté Pleso, 38(2), 191-200. 1335-1842.