Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47..381v&link_type=abstract
(International Astronomical Union and American Astronomical Society, Colloquium on Comets: Gases, Ices, Grains, and Plasma, 61st
Astronomy and Astrophysics
Astronomy
22
Astronomical Photometry, Comets, Infrared Astronomy, Infrared Photometry, Interplanetary Dust, Asteroids, Grains, Infrared Telescopes, Particle Size Distribution, Thermal Emission, Comets, Bowell Comet, P/Stephan-Oterma Comet, Infrared, Photometry, Flux, Colors, Comparisons, Scattering, Grains, Emissions, Thermal Properties, Temperatures, Models, Comae, Dust, Size, Wavelengths, Observations, Data, Asteroids, Albedo, Absorption
Scientific paper
Broadband IR photometry in the 1-20 micron range of the comets P/Stephan-Oterma and Bowell shows JHK colors similar to P/Meier and P/Tuttle, which are compatible with the scattering of sunlight by micron-sized grains. In addition, the P/Stephan-Oterma thermal emission was found to have an effective temperature higher than that expected from a blackbody in equilibrium. It is demonstrated that the thermal emission can be fit by models of the dust coma consisting of micron-sized grains, and that most of the flux at all observed wavelengths comes from the dust grains rather than the nucleus.
Hanner Martha S.
Veeder Glenn J. Jr.
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