The Infrared Activity of Comet P/Halley 1986 III at Heliocentric Distances from 0.6 to 5.92 AU

Details The Infrared Activity of Comet P/Halley 1986 III at Heliocentric Distances from 0.6 to 5.92 AU The Infrared Activity of Comet P/Halley 1986 III at Heliocentric Distances from 0.6 to 5.92 AU

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aj....130.2383g&link_type=abstract

The Astronomical Journal, Volume 130, Issue 5, pp. 2383-2391.

Astronomy and Astrophysics

Astronomy

4

Comets: Individual (P/Halley 1986 Iii), Ism: Dust, Extinction, Infrared: Solar System

Scientific paper

We present an analysis of the combined infrared data for comet 1P/Halley 1986 III acquired by Gehrz and Ney, Hanner and coworkers, Tokunaga and coworkers, Green and coworkers, Ryan and Campins, and Bregman and coworkers. This database, the largest single body of infrared photometric data for any comet, spans a wavelength range from 0.7 to 23 μm and describes the activity of P/Halley at heliocentric distances from 0.6 to 5.92 AU. Coverage of the thermal infrared spectrum was obtained for heliocentric distances from 0.6 to 2.8 AU. The quantitative corrections and calibration procedures required to intercompare the individual data sets are described. Long-term trends in the heliocentric dependence of P/Halley's grain color temperature, silicate emission optical strength, average grain albedo, apparent luminosity, and infrared monochromatic fluxes are discussed. The normalized thermal infrared flux varied as r-2.2 preperihelion and r-2.1 postperihelion in accord with the slope of the water production rate, indicating a general correlation between dust and gas production. Large-amplitude short-term (hours) fluctuations in all the observable quantities were seen in small apertures; these changes correlated with gas production rates and the presence of jets. Changes in JHK colors and the incomplete correlation between superheat and silicate feature strength imply variability in the grain composition, as well as in the size distribution. Based on a comparison of infrared data, comet Hale-Bopp (C/1995 O1) ejected a much higher relative abundance of submicron grains than Halley, and this pattern persisted to larger heliocentric distances.

Affiliated with

Also associated with

No associations

Rating

The Infrared Activity of Comet P/Halley 1986 III at Heliocentric Distances from 0.6 to 5.92 AU 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 The Infrared Activity of Comet P/Halley 1986 III at Heliocentric Distances from 0.6 to 5.92 AU, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Infrared Activity of Comet P/Halley 1986 III at Heliocentric Distances from 0.6 to 5.92 AU will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1834982