000002501 001__ 2501
000002501 005__ 20160701171706.0
000002501 037__ $$aASTROimport-658
000002501 100__ $$aZorec, J.
000002501 245__ $$aDiscrete mass ejections in Be stars
000002501 260__ $$c2004
000002501 520__ $$aHeI lines are currently used to study the atmospheric activity of Be stars, in particular their non radial pulsation phenomena. Moreover, the HeI 6678 line is quite sensitive to mass ejections, as revealed by the presence of emission components in the wings. In the present paper we show that the highly variable aspect of the emission in the HeI 6678 line, as well as the changes of the photospheric like absorption component, can be due to orbiting clouds ejected by the star. The modeling of the variability of the HeI 6678 line could then help to estimate the strength of the magnetic field needed to maintain the ejected clouds, as it is meant, in nearly rigid rotation with the underlying star. 
000002501 700__ $$a Frémat, Y.
000002501 700__ $$a Leister, N. V.
000002501 700__ $$a Levenhagen, R. S.
000002501 773__ $$c325$$pSF2A-2004: Semaine de l'Astrophysique Francaise$$y2004
000002501 85642 $$ahttp://esoads.eso.org/abs/2004sf2a.conf..325Z
000002501 905__ $$apublished in
000002501 980__ $$aNONREF