The Resonance Mechanism of Wolf-Rayet Envelope Emission

Details The Resonance Mechanism of Wolf-Rayet Envelope Emission The Resonance Mechanism of Wolf-Rayet Envelope Emission

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987atsir1505....1k&link_type=abstract

Astronomicheskii Tsirkulyar NO. 1505/AUG, P. 1, 1987

Astronomy and Astrophysics

Astronomy

Scientific paper

A new "resonance" mechanism is suggested for the WR envelope emission. The intense absorption of the core radiation in resonance lines (1 → i) and in lines of absorption from the second (2 → i) and perhaps from metastable levels takes place in the envelope. The downward spontaneous transitions i → k (k = 2,3,...,i-1) result in the observed line emission. It is shown that the resonance mechanism can provide the observed absolute intensities of He II lines in the spectrum of V444 Cyg for T > 80000K. Apparently the WR phenomenon is connected just with the resonance mechanism of excitation of an expanding envelope.

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