Interstellar 2200 A, a new charge transfer solution?

Details Interstellar 2200 A, a new charge transfer solution? Interstellar 2200 A, a new charge transfer solution?

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..593c&link_type=abstract

In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 593-59

Astronomy and Astrophysics

Astrophysics

Charge Transfer, Interstellar Extinction, Interstellar Radiation, Near Ultraviolet Radiation, Hydrogen, Iron, Magnesium, Positive Ions, Silicon

Scientific paper

It is proposed that the interstellar 2200 Å feature is caused by charge transfer between H and Fe+, Si+, Mg+. Apart from a much weaker feature near 1600 Å due to Al+, Na+, and Ca+, no other detectable features are expected to occur. The charge transfer reaction must take place on the surface of grains. It is suggested that the broad diffuse features seen in the visible might be caused by charge transfer between simple molecules and common atoms. In particular 4430 Å may be caused by charge transfer between CH and Fe+.

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