On buckyonions as a carrier of the 2175 Å interstellar extinction feature

Details On buckyonions as a carrier of the 2175 Å interstellar extinction feature On buckyonions as a carrier of the 2175 Å interstellar extinction feature

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..251...71c&link_type=abstract

Organic Matter in Space, Proceedings of the International Astronomical Union, IAU Symposium, Volume 251, p. 71-72

Astronomy and Astrophysics

Astronomy

Dust, Extinction, Ism: Lines And Bands, Ism: Molecules

Scientific paper

In recent years buckyonions have been suggested as a carrier of the 2175 Å interstellar extinction feature, based on the close similarity between the electronic transition spectra of buckyonions and the 2175 Å interstellar extinction feature. We examine this hypothesis by calculating the interstellar extinction with buckyonions as a dust component. It is found that dust models containing buckyonions (in addition to amorphous silicates, PAHs, graphite or amorphous carbon) can closely reproduce the observed interstellar extinction curve. However, a more severe challenge to the buckyonion hypothesis is provided by the non-detection of the ~7 8 μm C H stretching bands expected from buckyonions in the diffuse interstellar medium. This will allow us to place an upper limit on the abundance of buckyonions.

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