On the nature of the particles causing the 2200 A peak in the extinction of starlight

Details On the nature of the particles causing the 2200 A peak in the extinction of starlight On the nature of the particles causing the 2200 A peak in the extinction of starlight

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.122..181h&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 122, no. 1, May 1986, p. 181-184.

Astronomy and Astrophysics

Astronomy

2

Cosmic Dust, Interstellar Extinction, Ultraviolet Astronomy, Absorption Spectra, Grain Size, Graphite

Scientific paper

Wavelengths of maximum absorbance of the essentially spherical molecule C60 as a function of alpha are reported to substantiate the possibility of C60 explaining the 2180 A peak in the extinction of starlight, an explanation which is free of objections to the earlier graphite hypothesis. An alpha of 0.45 is required for the optical constants of graphite to match the IUE satellite data. Particles of 7 A diameter would have essentially zero scattering coefficient and would lead to a smaller 2180 A interstellar grain albedo than previously calculated.

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