The Spatial Distribution of Radical Species in the Coma of Comet Encke

Details The Spatial Distribution of Radical Species in the Coma of Comet Encke The Spatial Distribution of Radical Species in the Coma of Comet Encke

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.2904p&link_type=abstract

American Astronomical Society, DPS meeting #38, #29.04; Bulletin of the American Astronomical Society, Vol. 38, p.535

Astronomy and Astrophysics

Astronomy

Scientific paper

Understanding the spatial distribution of gas in the coma of comet Encke, a comet known for its asymmetric outgassing, remains a significant challenge. The 2003 apparition of comet Encke afforded an excellent opportunity to study its coma due to its close passage to the Earth (0.26 A.U.). During October 22-24, we used the 2.7 m telescope at the University of Texas McDonald Observatory to obtain long-slit spectra in the wavelength range of 3000-5600 Å. The slit was rotated through several position angles, allowing us to map the spatial distribution of six species (C2, C3, CH, CN, NH, and OH) in the coma. We have investigated how the scale lengths of these species differ with respect to position angle and time. These studies have implications for understanding the chemical processes responsible for the formation of radicals that we observe in the visible spectra of comets.

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