JIRAM Observations of Volcanic Flux on Io: Distribution and Comparison to Tidal Heat Flow Models ...

• Main Authors: Pettine, M., Imbeah, S., Rathbun, J., Hayes, A., Lopes-Gautier, R., Mura, A., Tosi, F., Zambon, F., Bertolino, S.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: arXiv 2023
• Subjects: Earth and Planetary Astrophysics astro-ph.EP; FOS Physical sciences; South Pole; South pole
• Online Access: https://dx.doi.org/10.48550/arxiv.2308.05717; https://arxiv.org/abs/2308.05717

The Jovian Infrared Auroral Mapper (JIRAM) instrument aboard Juno has allowed clear, high-resolution imaging of Io's polar volcanoes. We have used data from JIRAM's M-band (4.78 micron) imager from eleven Juno orbits to construct a global map of volcanic flux. This map provides insight into the spatial distribution of volcanoes and the ways in which high- and low-latitude volcanoes differ. Using spherical harmonic analysis, we have quantitatively compared our volcanic flux map to the surface heat flow distribution expected by modeling data of Io's tidal heat deposition (de Kleer et al. 2019). Systems of bright volcanoes were confirmed at high latitudes. Our study finds that both poles are more active than previous studies have suggested, although the south pole was viewed too infrequently to establish reliable long-term trends. While none of the tidal heat flow models match well, the asthenospheric heating model agrees best with the observed volcanic flux. ... : The paper is in revision and this version does not reflect the current status of the paper. Once it's published, the newest version will be uploaded ...