An ultraviolet stellar catalog for occultation measurements, planetary illumination modeling, and spectral sky map analyses

Michael A. Velez; Kurt D. Retherford; Vincent Hue; Joshua A. Kammer; G. Randall Gladstone; Michael W. Davis; Thomas K. Greathouse; Tracy M. Becker; Philippa M. Molyneux; Shawn M. Brooks; Ujjwal Raut; Andrew J. Steffl; Maarten H. Versteeg

doi:10.1117/12.2630352

31 August 2022 An ultraviolet stellar catalog for occultation measurements, planetary illumination modeling, and spectral sky map analyses

Michael A. Velez, Kurt D. Retherford, Vincent Hue, Joshua A. Kammer, G. Randall Gladstone, Michael W. Davis, Thomas K. Greathouse, Tracy M. Becker, Philippa M. Molyneux, Shawn M. Brooks, Ujjwal Raut, Andrew J. Steffl, Maarten H. Versteeg

Author Affiliations +

Proceedings Volume 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray; 1218133 (2022) https://doi.org/10.1117/12.2630352
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Ultraviolet spectroscopy is a powerful method used to study planetary surface composition through reflectance measurements and atmospheric composition through stellar/solar occultations, transits of other planetary bodies, and direct imaging of airglow and auroral emissions. The next generation of ultraviolet spectrographs (UVS) on board ESA’s JUICE (Jupiter icy moons explorer) and NASA’s Europa Clipper missions will perform such measurements of Jupiter and its moons in the early 2030’s. This work presents a compilation of a detailed UV stellar catalog of targets with high intensity in the 52-204 nm region with applications relevant to planetary spectroscopy. These applications include: 1) planning and simulating occultations, including calibration measurements; 2) modeling starlight illumination of dark, nightside planetary surfaces primarily lit by the sky; and 3) studying the origin of diffuse galactic UV light as mapped by existing datasets from Juno-UVS. This catalog also includes information drawn from other resources such as the international ultraviolet explorer (IUE) catalog and SIMBAD. We have constructed spectra at 0.1 nm resolution for over 80,000 targets using Kurucz models and, when available, IUE spectra. We report on our methods for producing the catalog and discuss plans for its implementation during ongoing and upcoming planetary missions.

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Michael A. Velez, Kurt D. Retherford, Vincent Hue, Joshua A. Kammer, G. Randall Gladstone, Michael W. Davis, Thomas K. Greathouse, Tracy M. Becker, Philippa M. Molyneux, Shawn M. Brooks, Ujjwal Raut, Andrew J. Steffl, and Maarten H. Versteeg "An ultraviolet stellar catalog for occultation measurements, planetary illumination modeling, and spectral sky map analyses", Proc. SPIE 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 1218133 (31 August 2022); https://doi.org/10.1117/12.2630352

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