VLA observations of the OH emission from Comet Wilson (1986) - The value of high resolution in both spatial and velocity coordinates

Details VLA observations of the OH emission from Comet Wilson (1986) - The value of high resolution in both spatial and velocity coordinates VLA observations of the OH emission from Comet Wilson (1986) - The value of high resolution in both spatial and velocity coordinates

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97.1791p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, June 1989, p. 1791-1797. Research supported by the Alfred P. Sloan Foundation.

Astronomy and Astrophysics

Astronomy

8

Comets, Hydroxyl Emission, Very Large Array (Vla), Halley'S Comet, Spatial Distribution, Spectral Line Width, Comets, Wilson, Astronomy, Emissions, Oh Radical, Velocity, Brightness, Comparisons, Stability, Ultraviolet, Intensity, Comet Nuclei, Ejection, Cometesimals, Fragmentation, Symmetry, Earth-Based Observations, Spectra, Geometry, Maps, Outgassing, Production Rates, Jetting, Distribution, Gases

Scientific paper

In comparison with Comet Halley, the radio OH emission from Comet Wilson behaved very erratically, changing rapidly in position as well as in velocity, while the emission and brightness distribution from Comet Halley displayed apparent stability. A few months later, nearer perihelion, just the opposite behavior was observed at UV wavelengths. Another difference between the two comets is that the OH emission from Comet Halley seemed confined to a region a few times 100.000 km in size, while the emission from Comet Wilson showed up in sporadic blobs, with variable intensities and velocities, at distances as far as 10 to the 6th km from the nucleus. This behavior in Comet Wilson may be associated with the disintegration of the outer frosting associated with new comets and possibly with the fragmentation and ejection of cometesimals from the nucleus. As part of the data analysis, it is demonstrated that lengthening the integration time and lowering the velocity resolution affects the symmetry of the OH images and spectral-line profiles. As a consequence, asymmetric cometary OH line profiles may be more common than previously thought.

Affiliated with

Also associated with

No associations

Rating

VLA observations of the OH emission from Comet Wilson (1986) - The value of high resolution in both spatial and velocity coordinates 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 VLA observations of the OH emission from Comet Wilson (1986) - The value of high resolution in both spatial and velocity coordinates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLA observations of the OH emission from Comet Wilson (1986) - The value of high resolution in both spatial and velocity coordinates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1849783