250 GHz observations of Be stars |
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| Authors: | HJ Wendker WJ Altenhoff C Thum |
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| Abstract: | New 250 GHz flux density measurements with the 30 m telescope at Pico Veleta are presented for 3 Be stars. We suggest that the radio spectral indexis typically close to 1.4 for these stars. We present in a discusssion of own and literature data some evidence that in few cases slow variations with a time scale of about a year occur. Both evidence is compatible with the idea that there is no stellar activity type radio emission of Be stars but a may be slightly modulated quiescent radiation of the outer parts of selfsimilar circumstellar disks. An immediate improvement of existing models is not possible. |
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| Keywords: | Be stars circumstellar disks radio stars |
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