Evidence for autoionization and dielectronic recombination of SI II in the atmospheres of B-type stars

Details Evidence for autoionization and dielectronic recombination of SI II in the atmospheres of B-type stars Evidence for autoionization and dielectronic recombination of SI II in the atmospheres of B-type stars

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97l...9u&link_type=abstract

Astronomy and Astrophysics, vol. 97, no. 2, Apr. 1981, p. L9-L11.

Astronomy and Astrophysics

Astrophysics

11

Autoionization, B Stars, Electron Recombination, Silicon, Stellar Atmospheres, Astrophysics, Stellar Spectra, Supergiant Stars

Scientific paper

Observations are reported demonstrating that both of the 3s3p3d 2F0 levels of Si II autoionize in the atmospheres of B-type stars. A justification is given for concluding that the 2F05/2 level which lies below the laboratory position for the 3s2(1S) limit of Si II, autoionizes in stellar atmospheres. The 2F7/2 level lies above the 3s2(1S) limit and satisfies the selection rules for autoionization.
The occurrence in the atmosphere of P Cygni of dielectronic recombination from the 3s3p3d 2F0 levels of Si II is noted.

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