Io's heat flow from infrared radiometry: 1983-1993

Abstract

Results from a decade of infrared radiometry of Io are presented. Observations of Io at M (4.8 μm), 8.7 μm, N (10 μm), and Q (20 μm) with the Infrared Telescope Facility presented here were collected during nine apparitions between 1983 and 1993. These measurements provide full longitudinal coverage as well as an eclipse observation and the detection of two outbursts. Reflected sunlight, passive thermal emission, and radiation from thermal anomalies all contribute to the observed flux densities. A new thermophysical model is required to match all the data. -from Authors