Direct Detection of Seasonal Changes on Triton with Hubble Space Telescope

Details Direct Detection of Seasonal Changes on Triton with Hubble Space Telescope Direct Detection of Seasonal Changes on Triton with Hubble Space Telescope

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...723l..49b&link_type=abstract

The Astrophysical Journal Letters, Volume 723, Issue 1, pp. L49-L52 (2010).

Astronomy and Astrophysics

Astronomy

3

Planets And Satellites: Individual: Triton, Planets And Satellites: Surfaces

Scientific paper

Triton is one of the few bodies in the solar system with observed cryo-volcanic activity, in the form of plumes at its south pole, which suggests large-scale surface volatile transport over time. Triton's large variations in obliquity have motivated prior predictions of changing atmospheric column densities of several orders of magnitude, driven by seasonal evaporation of surface volatiles. Using the Hubble Space Telescope, we directly imaged Triton's surface and have detected large-scale differences in increased and decreased reflectance when compared with Voyager data at UV, visual, and methane-band wavelengths. Our surface map shows regions of increased brightness at near-equatorial latitudes and near the Neptune-facing side, and darkened regions near longitudes of ±180°, indicating the presence of ongoing seasonal volatile transport.

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