Resolution of the circumstellar gas around the Be star Psi Persei

Details Resolution of the circumstellar gas around the Be star Psi Persei Resolution of the circumstellar gas around the Be star Psi Persei

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.359..808d&link_type=abstract

Nature (ISSN 0028-0836), vol. 359, no. 6398, p. 808-810.

Physics

54

B Stars, Interstellar Gas, Stellar Envelopes, Emission Spectra, Radio Emission, Stellar Rotation

Scientific paper

The VLA has been used to resolve the circumstellar envelope of the Be star Psi Persei at 15 GHz, and it is found that its radio emission comes from a nonspherical distribution of thermally radiating gas. The radio-emitting region has a major axis of 111 +/- 16 mas and is unresolved, with a 3 sigma upper limit of 68 mas, along its minor axis. The observations confirm the proposal by Struve (1931) that equatorially enhanced circumstellar plasma distributions are the source of Be star emission.

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