The nature of the 2.8-micron emission feature in cometary spectra
Abstract
It is suggested that the the emission at 2.8 microns previously observed in the P/Halley 1986 III and Wilson 1987 VII comets is mainly due to the long-wavelength parts of the nu and (101-100) water bands. Much weaker contributions come from other water bands and from vibrationaly excited OH produced by H2O photolysis. Synthetic profiles of these emissions are presented and compared to the observations. The water production rates of the comets are derived.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1989
- Bibcode:
- 1989A&A...216..278B
- Keywords:
-
- Cometary Atmospheres;
- Infrared Astronomy;
- Infrared Sources (Astronomy);
- Halley'S Comet;
- Hydrolysis;
- Hydroxyl Radicals;
- Rotational Spectra;
- Vibrational Spectra;
- Water;
- COMETS;
- SPECTRA;
- EMISSIONS;
- ASTRONOMY;
- SPECTROSCOPY;
- INFRARED;
- INTENSITY;
- WAVELENGTHS;
- WATER;
- OH RADICAL;
- HALLEY;
- WILSON;
- AIRCRAFT OBSERVATIONS;
- PRODUCTION RATES;
- COMPARISONS;
- FLUORESCENCE;
- PHOTOLYSIS;
- KAO AIRCRAFT;
- SATELLITE OBSERVATIONS;
- IUE SATELLITE;
- Astrophysics; Comets