Observational evidence for global oscillations in be star disks |
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| Authors: | R W Hanuschik |
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| Institution: | (1) Astronomisches Institut, Ruhr-Universität Bochum, D-44780 Bochum, Germany |
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| Abstract: | From a long-term spectroscopic observing campaign of Be stars we have found that their emission line profiles separate into two classes, the second of which is very asymmetric. The sign of asymmetry changes on a timescale of a few years. We show that these line profiles and the well-known enigmaticV/R variations observed in some Be stars are two aspects of the same phenomenon, one-armed global oscillations in a Keplerian disk. We present model profiles and a line fit to support this hypothesis and find good overall agreement. |
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| Keywords: | Be stars emission lines circumstellar matter |
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