Thermal Infrared Spectra of Comet Hale-Bopp at Heliocentric Distances of 4 and 2.9 AU

被引：0
|
作者：
John K. Davis
Thomas R. Geballe
Marthe S. Hanner
H. A. Weaver
Jacques Crovisier
Dominique Bockelée-Morvan
机构：
[1] Joint Astronomy Centre,Department of Physics and Astronomy
[2] Jet Propulsion Laboratory,undefined
[3] John Hopkins University,undefined
[4] Observatoire de Paris-Meudon,undefined
来源：
Earth, Moon, and Planets | 1997年 / 78卷
关键词：
Comet; infrared; dust; silicates;
D O I：
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摘要：
We present 10 and 20 μm spectra of comet Hale-Bopp taken at UKIRT on 1996 June 20 and 1996 September 29.The 10 μm spectra clearly show a strong silicate feature with peaks at 10.0 and 11.2 μm. The 20 μm spectrum on September 29 has strong excess flux relative to a blackbody and a peak near 19μm, in good agreement with the ISO SWS spectra obtained a week later. However, the 20 μm spectrum on June 20 has significantly lower flux than would be expected based on a blackbody extrapolation from the flux at 12.5 μm.
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页码：293 / 298
页数：5
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