Inhomogeneities in the circumstellar envelope of the A0E herbig star AB aur |
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| Authors: | Nina Beskrovnaya Mikhail Pogodin Ivan Najdenov Iosiff Romanyuk |
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| Institution: | (1) Pulkovo Observatory, 196140 St. Petersburg, Russia;(2) Special Astrophysical Observatory, 357147 Nizhnij Arkhyz, Russia |
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| Abstract: | Simultaneous high-resolution spectroscopy in H 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 H 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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| Keywords: | line profiles polarization stellar wind inhomogeneity |
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