Infrared observations of the dark side of Iapetus

Details Infrared observations of the dark side of Iapetus Infrared observations of the dark side of Iapetus

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...49..382l&link_type=abstract

Icarus, vol. 49, Mar. 1982, p. 382-386.

Astronomy and Astrophysics

Astronomy

15

Astronomical Photometry, Iapetus, Infrared Astronomy, Broadband, Frost, Infrared Absorption, Silicates

Scientific paper

J, H, K, L and L-prime broadband and 2.8-3.8 micron narrowband photometric observations have been made of the dark side of Iapetus with circularly variable filter techniques. A 3-micron absorption feature is found which is too deep to be a residual water frost feature from the bright material around the poles. In light of laboratory simulations showing that the dark material must have a strong 3-cm absorption, it is suggested that the material may be a hydrated silicate mixed with a small amount of water frost.

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