Interstellar dust grains: the hydrogenated amorphous carbon contribution

Details Interstellar dust grains: the hydrogenated amorphous carbon contribution Interstellar dust grains: the hydrogenated amorphous carbon contribution

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007msl..confe..54d&link_type=abstract

"Molecules in Space and Laboratory, meeting held in Paris, France, May 14-18, 2007. Editors: J.L. Lemaire, F. Combes. ISBN: 9782

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Laboratory

Scientific paper

Astronomical observations of hydrogenated amorphous carbon (HACs, a-C:H) and laboratory produced one, under conditions that resemble those of the DISM (low temperature, UV field and cosmic-rays) are crucial in understanding the chemical evolution of ISM grains. Extragalactic observations further demonstrate the ubiquitousness of a-C:H in the diffuse interstellar medium (DISM) of galaxies, for a long time almost only observed in the Milky- Way ISM lines-of-sights. The observed a-C:H features underline the existence of large masses of amorphous carbon dust in (extra-)galactic dust budgets. Such carbon grains might be present but spectroscopically hidden in many other galactic environments.

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