An almost total disjunction between emission and absorption dust features: What does it tell us?

Details An almost total disjunction between emission and absorption dust features: What does it tell us? An almost total disjunction between emission and absorption dust features: What does it tell us?

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..189l&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 189-192 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

1

Absorption Spectra, Emission Spectra, Infrared Spectroscopy, Interplanetary Dust, Hydrocarbons, Infrared Spectra, Molecules, Spectrum Analysis

Scientific paper

The features of absorption and emission spectra of interplanetary dust are analyzed. The absence of overlap between these two spectra is discussed. The comparison between the 3.4 microns band attributed to aliphatic C-H bonds seen in absorption and the 3.3 microns band assigned to aromatic C-H bonds seen only in emission is carried out. An interpretation is proposed. The emission and absorption spectra of the Galaxy M82 central part are shown. The chemical nature of the different populations of the interstellar matter is reviewed. The polycyclic aromatic hydrocarbon and the hydrogenated amorphous carbon models are underlined.

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