The O( 1D) Distribution of Comet Austin 1989c1 = 1990 V
Abstract
We obtained images of [OI]6300 emission from Comet Austin 1990 V using the Wisconsin dual-etalon Fabry-Perot/CCD imaging spectrometer at the McMath solar telescope on Kitt Peak. The field of view diameter on the sky was approximately 10.5. The spectral resolution of 0.21 Å was sufficient to image cometary [OI]6300 emission uncontaminated by nearby NH2 and telluric [OI]6300 emissions. Using a Haser model for the photodissociation of H2O and OH as sources of O(1D), we find that the OH mean lifetime τOH at 1 AU is (1.1 ± 0.3) × 105 sec.
- Publication:
-
Icarus
- Pub Date:
- January 1993
- DOI:
- 10.1006/icar.1993.1009
- Bibcode:
- 1993Icar..101...95S
- Keywords:
-
- Austin Comet;
- Emission Spectra;
- Forbidden Transitions;
- Hydroxyl Radicals;
- Oxygen Atoms;
- Oxygen Spectra;
- Atmospheric Models;
- Charge Coupled Devices;
- Imaging Spectrometers;
- Spectral Resolution;
- Telescopes;
- Telluric Lines;
- Water;
- COMETS;
- AUSTIN;
- OXYGEN;
- DISTRIBUTION;
- EMISSIONS;
- CCD METHODS;
- SPECTRA;
- EARTH-BASED OBSERVATIONS;
- SPECTROMETRY;
- MODELS;
- PHOTODISSOCIATION;
- WATER;
- HYDROXYL;
- OH RADICAL;
- LIFETIME;
- COMAE;
- TECHNIQUES;
- ANALYSIS;
- PARAMETERS;
- INTENSITY;
- PRODUCTION RATE;
- COLLISIONS;
- QUENCHING