Simultaneous high-resolution spectroscopy in Hα andUBVRI polarimetric observations are proposed as an effective method for the search for circumstellar inhomogeneities in A0-type Herbig stars. The new results for AB Aur are presented as a successful example of the use of this method. The analysis of about 100 CCD Hα profiles (R = 30 000) and more than 150 polarimetric measurements obtained in January, 1994 allowed to discover a long-lived stream-like inhomogeneity in the circumstellar gaseous envelope.
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Praderie, F., Simon, T., Catala, C., Boesgaard, A.M.: 1986,ApJ 303, 311
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Beskrovnaya, N., Pogodin, M., Najdenov, I. et al. Inhomogeneities in the circumstellar envelope of the A0E herbig star AB aur. Astrophys Space Sci 224, 429–430 (1995). https://doi.org/10.1007/BF00667890
- line profiles
- stellar wind