All comets are born equal: infrared emission by dust as a key to comet nucleus composition |
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| Institution: | 1. Laboratory Astrophysics, University of Leiden, Postbus 9504, 2300 RA Leiden, The Netherlands;2. Beijing Astronomical Observatory, Chinese Academy of Science, Beijing 100012, Peoples Republic of China;1. Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095-1567, USA;2. Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, USA;3. Korea Polar Research Institute, Incheon 406-840, Republic of Korea;4. Department of Earth Science Education, Seoul National University, Seoul 151-748, Republic of Korea;5. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1567, USA |
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| Abstract: | The infrared emission of various comets can be matched within the framework that all comets are made of aggregated interstellar dust. This is demonstrated by comparing results on Halley (a periodic comet), Borrelly (a Jupiter family short period comet), Hale-Bopp (a long period comet), and extra-solar comets in the β Pictoris disk. Attempts have been made to generalize the chemical composition of comet nuclei based on the observation of cometary dust and volatiles and the interstellar dust model. Finally, we deduce some of the expected dust and surface properties of comet Wirtanen from the interstellar dust model as applied to other comets. |
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