Three micron spectroscopy of dust

Details Three micron spectroscopy of dust Three micron spectroscopy of dust

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.192...59w&link_type=abstract

In ESA Galactic and Extragalactic Infrared Spectroscopy p 59-64 (SEE N83-18593 08-88)

Physics

Absorption Spectra, Atmospheric Windows, Dust, Extragalactic Radio Sources, Infrared Spectra, Emission Spectra, High Resolution, Ice, Line Spectra, Nebulae, Ultraviolet Radiation

Scientific paper

This contribution discusses recent observations of dust related spectral features in the 3-4 microns atmospheric window. A survey of 40 Herbig Be/Ae spectra reveals three cases of unidentified emission features in the 3.3-3.5 microns region analogous to those observed in nebulae. The 3.06 microns absorption attributed to water-ice is found to occur at much lower threshold optical depth in the Taurus molecular cloud than in Ophiuchus. Model fitting supports the ice identification, and suggests that the long wavelength wing may be a blended feature resembling the 3.2-3.6 microns absorption in the galactic center.

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