High Spectral Resolution Observations and Kinematic Modeling of the 1667 MHz Hyperfine Transition of OH in Comets Halley (1982i), Giacobini-Zinner (1984e), Hartley-Good (1985l), Thiele (1985m), and Wilson (1986l)
Abstract
High-sensitivity, high spectral resolution 18 cm observations of Comets Giacobini-Zinner, Halley, Hartley-Good, Thiele, and Wilson are used here to probe the kinematics of the coma gas of these comets. The day/night outgassing ratio for all these comets is 1.39 (0.13 or - 0.12), independent of gas productivity and heliocentric distance. It is found that the gas productivity of a comet plays a critical role in determining the coma kinematics for bright comets near the sun.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1990
- DOI:
- 10.1086/169450
- Bibcode:
- 1990ApJ...364..672T
- Keywords:
-
- Cometary Atmospheres;
- Giacobini-Zinner Comet;
- Halley'S Comet;
- Hydroxyl Emission;
- Hyperfine Structure;
- Radio Sources (Astronomy);
- Formalism;
- Monte Carlo Method;
- Outgassing;
- Spectral Resolution;
- Astrophysics;
- COMETS;
- RADIO SOURCES: LINES