The Small NASA Optical Ultraviolet Telescope (SNOUT): a SmallSat mission concept to connect extreme UV stellar flare to exoplanetary atmospheres

Keri Hoadley; Allison Youngblood; Sarah Peacock; Eliad Peretz; Bert Pasquale; Scott Bounds; Jeff Dolan; Richard Dvorsky; Casey DeRoo; Graham Kerr; Tommi Koskinen; Arika Egan; Kevin France

doi:10.1117/12.3017168

22 August 2024 The Small NASA Optical Ultraviolet Telescope (SNOUT): a SmallSat mission concept to connect extreme UV stellar flare to exoplanetary atmospheres

Keri Hoadley, Allison Youngblood, Sarah Peacock, Eliad Peretz, Bert Pasquale, Scott Bounds, Jeff Dolan, Richard Dvorsky, Casey DeRoo, Graham Kerr, Tommi Koskinen, Arika Egan, Kevin France

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 130930D (2024) https://doi.org/10.1117/12.3017168
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

What is the amount of ionizing energy incident on exoplanet atmospheres from their host stars? What is the relationship between white-light flares and this ionizing energy? These are key questions required to link our current archive of hundreds of stellar whitelight flares to the ionizing radiation released during them, and the ramifications of those flares on the survival of exoplanetary atmospheres, particularly for planets orbiting within the habitable zones of low-mass stars. The Small NASA Optical Ultraviolet Telescope (SNOUT) is a proposed Pioneers mission comprised of two co-pointing telescopes: one optimized for EUV wavelengths (comprised of three separate EUV segments) and one for visible wavelengths. SNOUT is designed to measure the quiescent extreme-UV (EUV) emission for 30 mow-mass stars (0.3 - 1 solar masses), covering a range of ages, in three EUV bandpasses. The combined instrument is housed in an ESPA-Grande spacecraft and will launch into low Earth orbit for a one-year baseline mission. SNOUT has a substantial educational and early-career mentoring component; early-career scientists and engineers comprise more than half of the team, including key leadership roles.

Conference Presentation

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Keri Hoadley, Allison Youngblood, Sarah Peacock, Eliad Peretz, Bert Pasquale, Scott Bounds, Jeff Dolan, Richard Dvorsky, Casey DeRoo, Graham Kerr, Tommi Koskinen, Arika Egan, and Kevin France "The Small NASA Optical Ultraviolet Telescope (SNOUT): a SmallSat mission concept to connect extreme UV stellar flare to exoplanetary atmospheres", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130930D (22 August 2024); https://doi.org/10.1117/12.3017168

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