Computer Science
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7919963f&link_type=abstract
Unknown
Computer Science
Infrared Spectroscopy, Oxygen, Stellar Atmospheres, Atmospheric Models, Dust, Emission Spectra, Satellite Observation, Silicates
Scientific paper
Airborne observations of the 16-39 microns spectra of ten oxygen-rich stars with excess emission in the infrared was obtained. The stars show excess emission attributed to circumstellar dust grains in the 16-39 microns region in the form of a broad hump peaking near 18 microns and falling smoothly to longer wavelengths. The emission is similar in character to the emission from the Trapezium region of the Orion nebula indicating the grain materials are quite similar in these objects. The existence of a feature in the 20 microns region is consistent with the 0-Si-0 bending resonance expected for silicate material. The lack of any sharp structure in the spectra indicates the silicate is in an amorphous, disordered form. A simple model of small grains of carbonaceous chondrite silicate material in a diffuse circumstellar envelope is shown to give a good qualitative fit to the observed 8-39 microns circumstellar spectra. Comparison of the observed spectra with the model spectra indicates the grain emissivity falls as 1/lambda squared from 20 microns to 40 microns.
Forrest William John
Houck James R.
McCarthy W. J.
No associations
LandOfFree
The 16-39 micron spectroscopy of oxygen-rich stars 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 The 16-39 micron spectroscopy of oxygen-rich stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 16-39 micron spectroscopy of oxygen-rich stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-831302