Magnetic Doppler imaging of early-type stars
2011 (English)In: Active OB stars: Structure, evolution, mass-loss, and critical limits / [ed] Neiner, C. et al., 2011, Vol. 272, 166-171 p.Conference paper (Refereed)
Doppler imaging of early-type magnetic stars is the most advanced method to interpret their line profile variations. DI allows us to study directly a complex interplay between chemical spots, magnetic fields, and the mass loss. Here we outline the general principles of the surface mapping of stars, discuss adaption of this technique to early-type stars and present several recent examples of the abundance and magnetic mapping performed for rapidly rotating early-B stars. In particular, we present the first Doppler images for the very fast rotating He-rich star HR 7355 and a reconstruction of magnetic field for the well-known Bp star a On E. We also present new magnetic maps for the He-strong star HD 37776, which possesses one of the most complex magnetic field topologies among the upper main sequence stars.
Place, publisher, year, edition, pages
2011. Vol. 272, 166-171 p.
, IAU Symposium Proceedings Series, ISSN 1743-9213 ; 272
polarization, stars: chemically peculiar, stars: magnetic fields, stars: atmospheres, stars: individual (HR 7355, sigma Ori E, HD 37776)
IdentifiersURN: urn:nbn:se:uu:diva-159322DOI: 10.1017/S1743921311010192ISI: 000294438200029ISBN: 978-0-52119-840-0OAI: oai:DiVA.org:uu-159322DiVA: diva2:444573
272nd Symposium of the International-Astronomical-Union on Active OB Stars: Structure, Evolution, Mass-Loss, and Critical Limits, 19-23 July 2010, Paris, France