Photodestruction rates in the circumstellar shell of Alpha Orionis by chromospheric radiation

Details Photodestruction rates in the circumstellar shell of Alpha Orionis by chromospheric radiation Photodestruction rates in the circumstellar shell of Alpha Orionis by chromospheric radiation

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331..463w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 331, Aug. 1, 1988, p. 463-466.

Astronomy and Astrophysics

Astrophysics

10

Chromosphere, Lyman Spectra, Photodissociation, Photoionization, Stellar Envelopes, Supergiant Stars, Ultraviolet Radiation, Heavy Ions, M Stars, Red Giant Stars, Silicon, Temperature Distribution

Scientific paper

Photoionization and photodissociation rates in the circumstellar shell of α Ori are calculated for the UV radiation field of the chromosphere. It is found that the heavy atoms like Mg, Si, S, and Fe are ionized and the molecules SiH+, SiH, and SiO are destroyed. The grain heating by the UV radiation field of the chromosphere is calculated.

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