Absorption Wavelengths and Bandwidths for Interstellar Searches of C60 in the 2400-4100 Å Region

Details Absorption Wavelengths and Bandwidths for Interstellar Searches of C60 in the 2400-4100 Å Region Absorption Wavelengths and Bandwidths for Interstellar Searches of C60 in the 2400-4100 Å Region

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apjs..135..263s&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 135, Issue 2, pp. 263-273.

Astronomy and Astrophysics

Astronomy

9

Ism: Molecules, Molecular Data, Molecular Processes, Techniques: Spectroscopic, Ultraviolet: Ism

Scientific paper

Low-temperature gas-phase wavelengths and bandwidths for astronomical searches for C60 in the 2400-4100 Å region are determined from the absorption spectra of C60 in rare gas matrices at 4 K, coupled with information on the dependence of the vibronic transition frequencies of this fullerene on the Lorentz-Lorenz polarizability parameter of matrices and solvents. These bandwidths increase from 25+/-5 cm-1 for the 1 1T1u-1 1Ag band at 4024.0+/-0.5 Å to 2300+/-200 cm-1 for the 6 1T1u-1 1Ag band at 2488+/-8 Å. Spectral observations of astrophysical objects considered to be likely sites of C60 have been examined in the context of the wavelengths and bandwidths of bands of the allowed transitions of C60 which we recommend for searches of this species. No certain positive assignment of a C60 band has been made in the 2400-4100 Å spectral region of these objects. The physical origin of the observed C60 absorption bandwidths is analyzed and discussed in an appendix.

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