Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...339l...9l&link_type=abstract
Astronomy and Astrophysics, v.339, p.L9-L12 (1998)
Astronomy and Astrophysics
Astrophysics
49
Comets: General, Comet: Individual: C/1995 O1 (Hale-Bopp), Infrared: Solar System
Scientific paper
We report observational evidence for water ice in comet C/1995 O1 (Hale-Bopp) when it was at 2.9 AU from the Sun, from emission features at 44 and 65 mu m, and possibly an absorption feature at 3.1 mu m, observed with ISO/LWS and PHT. We find that icy grains have mean radii of 15 mu m within a factor of 2, lifetimes of ~ 2 days, a temperature of ~ 153 K, and a total mass of ~ 2x10(9) kg. From investigation of the continuum spectrum at 43-195 mu m, we also infer a production rate of large particles ( ~ 100 mu m) dust of about 4x10(4) kg s(-1) . Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with participation of ISAS and NASA.
Altieri Bruno
Bockelée-Morvan Dominique
Crovisier Jacques
Hanner Martha S.
Leech Kieron
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