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| Paper: |
Center-Surround Application to JWST NIRISS Aperture Masking Interferometry Observations of Io |
| Volume: |
538, ADASS XXXII |
| Page: |
85 |
| Authors: |
Deepashri Thatte; Anand Sivaramakrishnan; Kevin Volk; Imke de Pater; Thierry Fouchet; Albert Conrad; John Stansberry; Joel Sánchez-Bermúdez; Bryan Holler; Mike Wong; Ned Molter; Rachel Cooper |
| DOI: |
10.26624/ZQCZ5337 |
| Abstract: |
We present center-surround application to James Webb Space Telescope (JWST), Near Infrared Imager and Slitless Spectrograph (NIRISS) observations of Io,
Jupiter’s innermost moon. This project is part of the JWST Early Release Science pro-
gram ERS1373 (Co-PI’s Imke de Pater, Thierry Fouchet) on the Jovian system. Io is
the most geologically active body in our solar system; however, the locations of tidal
heating in the interior and temperature of Io’s magma leading to the volcanic eruptions
are not well constrained (Keszthelyi et al. 2016). NIRISS’s Aperture Masking Interferometry (AMI) mode that utilizes a 7-hole non-redundant mask (NRM) in its pupil plane
provides high-resolution imaging with moderate contrast and better astrometric accuracy over a wide field of view than conventional imaging. We present interferometric
observations of Io from ERS1373 using NRM and filter F430M that is well matched to
the emission from Io’s 500 K to ~1500 K lava flows. Convolution of Io images with the
center-surround kernel emphasizes fine structure on Io’s disk. This convolved image is
used as a ’prior’ to reconstruct images from Io’s interferometric data, thus helping to
provide new measurements of the global distribution of vulcanism on Io. |
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