Magnetic field connected fast line profile variability in spectra of bright O supergiants

Details Magnetic field connected fast line profile variability in spectra of bright O supergiants Magnetic field connected fast line profile variability in spectra of bright O supergiants

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mast.conf..250k&link_type=abstract

Magnetic stars, Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS, Au

Astronomy and Astrophysics

Astrophysics

2

Early Type, Magnetic Fields, Profiles

Scientific paper

Results of study of fast line profile variability (lpv) in the spectra of selected bright O-stars are reported. A regular component of lpv in the spectra of the star λ Ori A with estimated period P≈ 3 d have been detected. We suppose that the formation of long time-scale regular components of lpv can be explained in the framework of the magnetically confined wind-shock (MCWS) model of Babel & Montmerle (1997a). In the context of testing the MCWS model the program of searching for weak magnetic fields in bright O and early B stars is outlined. The possibility of measuring weak longitudinal magnetic fields (Bl ≈ 100 G) is demonstrated.

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