Other
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.0909s&link_type=abstract
American Astronomical Society, DPS meeting #28, #09.09; Bulletin of the American Astronomical Society, Vol. 28, p.1089
Other
6
Scientific paper
We present analysis of mid-infrared imaging of Comet Hyakutake taken with the UCSD "Golden Gopher" infrared camera at the 1.5-m Mt. Lemmon Observational Facility on the nights of 18-20 March 1996 UT. High- resolution images (100 km/pixel at the comet) of the inner coma, covering 5000 km centered on the nucleus, were obtained at 8.7, 11.7, and 12.5 microns on all three nights, and the first-ever 19.5 microns images of the comet were obtained on the nights of March 19 and 20. Photometry in a 10-arcsecond aperture at these wavelengths reveals dust temperatures 20%, 30%, and 10% higher than the equilibrium temperature on these three nights, respectively. The 10-microns silicate emission feature is generally weak, and only discernible at 11.7-microns on March 19 when the Superheat is 30%. This suggests that the major dust constituents are not silicate grains, but probably large (radii > 5 microns , densities close to 1.0 g/cm(3) ) organic grains (Sarmecanic et al., 1996). Assuming these grains predominate, the mass loss rate on these nights is estimated to be about 5x10(3) kg/s. The observed coma morphology is generally isotropic, but exhibits an anti-Sunward extension, as well as a broad Sunward enhancement. These features dominate the structure when the isotropic (1/r) component of the dust emission is subtracted off. Furthermore, these features persist from night to night, implying that the rotation period is an integral fraction of 24 hours, say 6 or 8 hours, as has been suggested by other observers (IAUC 6344, 6354, 6372). Finally, color maps of the ratios of different wavelengths will be presented.
Fomenkova Marina
Jones Barbara
Sarmecanic J.
No associations
LandOfFree
Mid-Infrared Imaging of C/1996 B2 (Hyakutake) 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 Mid-Infrared Imaging of C/1996 B2 (Hyakutake), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mid-Infrared Imaging of C/1996 B2 (Hyakutake) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1461080