Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...137l...5l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 137, no. 1, Aug. 1984, p. L5-L8.
Astronomy and Astrophysics
Astrophysics
982
Cosmic Dust, Emission Spectra, Infrared Spectra, Interstellar Chemistry, Carbon, Electromagnetic Absorption, Graphite, Hydrogen, Transient Heating
Scientific paper
A consistent explanation for the so-called unidentified IR emission features of interstellar dust is proposed. Following Sellgren (1984), the transient heating of very small grains to a peak temperature of about 1000 K by the absorption of a single UV photon is considered, and the subsequent IR emission is estimated. It is shown that graphite is one of the few solids that would not sublime under such conditions, and that the stretching modes of the CH radicals resulting from the conditions give an excellent fit to the observed 3.28 micron emission band. It is demonstrated that bulk graphite optical constants are inadequate for small carbon clusters due to a size effect. The expected emission of coronene, a medium-sized polycyclic aromatic molecule, heated to an average temperature of 600 K is computed and the spectral features are found to be in impressive agreement with most of the observed emission bands.
Leger Alain
Puget Jean-Loop
No associations
LandOfFree
Identification of the 'unidentified' IR emission features of interstellar dust? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Identification of the 'unidentified' IR emission features of interstellar dust?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identification of the 'unidentified' IR emission features of interstellar dust? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1673611