Infrared photometry of the dust in comets

Details Infrared photometry of the dust in comets Infrared photometry of the dust in comets

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..162h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, Jan. 1984, p. 162-169.

Astronomy and Astrophysics

Astronomy

67

Astronomical Photometry, Cometary Atmospheres, Cosmic Dust, Infrared Astronomy, Infrared Photometry, Thermal Emission, Bandpass Filters, Grigg-Skjellerup Comet, Infrared Spectra, Magnitude, Temperature Measurement

Scientific paper

Infrared observations of six comets ranging in heliocentric distance from 1 to 5 AU are reported. Data consist of wide and intermediate bandpass filter photometry, 1-20 microns, for periodic comets Stephan-Oterma, Swift-Gehrels, Kearns-Kwee, Gunn, and Grigg-Skjellerup and for parabolic Comet Elias (1981 XV). All of the comets show infrared temperatures hotter than a theoretical black body, indicating small absorbing grains. No emission feature at 10 microns was observed within the accuracy of the filter photometry. The photometric system is discussed in detail, and temperature-dependent corrections to monochromatic magnitudes are presented.

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