Large Binocular Telescope Adaptive Optics Mid-infrared Spectroscopy of Thermal Radiation from an Eruption near Io's Gish Bar Patera
Abstract
This contribution reports mid-infrared low-resolution spectroscopy (2.8 - 4.2 um; 120) of Jupiter's satellite Io obtained with the grism-equipped Large Binocular Telescope Mid-Infrared Camera (LMIRcam). LMIRcam operates behind the Large Binocular Telescope Interferometer (LBTI). For these observations, obtained 22OCT2014UT1200, only one of the two LBT 8.4-meter primaries was in operation, limiting the adaptive optics corrected PSF to a FWHM of 0.1" at L'-band (3.8 um) corresponding to approximately 10 resolution elements across the 1.02" disk presented by Io at the time. The visible hemisphere of Io contained one dominant hotspot at a longitude of ~95 W. The latitude and longitude of this hotspot is consistent with Gish Bar Patera. The LMIRcam slit is oriented in azimuth such that dispersion is in the altitude direction. At the time of observation the altitude direction was approximately 20 degrees from the direction of Io's north pole, thus the slit's long direction was oriented largely along a line of constant latitude with the hotspot centered on the slit capturing the spectrum of the hotspot as well as reflected/emitted light from the disk of Io at similar latitude.
- Publication:
-
AAS/Division for Planetary Sciences Meeting Abstracts #46
- Pub Date:
- November 2014
- Bibcode:
- 2014DPS....4641815S