The Planet as Exoplanet Analog Spectrograph (PEAS): design and first-light

Emily C. Martin; Andrew J. Skemer; Matthew V. Radovan; Steven L. Allen; David Black; William T. S. Deich; Jonathan J. Fortney; Gabriel Kruglikov; Nicholas MacDonald; David Marques; Evan C. Morris; Andrew C. Phillips; Dale Sandford; Julissa Villalobos Valencia; Jason J. Wang; Pavl Zachary

doi:10.1117/12.2560706

15 December 2020 The Planet as Exoplanet Analog Spectrograph (PEAS): design and first-light

Emily C. Martin, Andrew J. Skemer, Matthew V. Radovan, Steven L. Allen, David Black, William T. S. Deich, Jonathan J. Fortney, Gabriel Kruglikov, Nicholas MacDonald, David Marques, Evan C. Morris, Andrew C. Phillips, Dale Sandford, Julissa Villalobos Valencia, Jason J. Wang, Pavl Zachary

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114470T (2020) https://doi.org/10.1117/12.2560706
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Exoplanets are abundant in our galaxy and yet characterizing them remains a technical challenge. Solar System planets provide an opportunity to test the practical limitations of exoplanet observations with high signal-to-noise data that we cannot access for exoplanets. However, data on Solar System planets differ from exoplanets in that Solar System planets are spatially resolved while exoplanets are unresolved point-sources. We present a novel instrument designed to observe Solar System planets as though they are exoplanets, the Planet as Exoplanet Analog Spectrograph (PEAS). PEAS consists of a dedicated 0.5-m telescope and off-the-shelf optics, located at Lick Observatory. PEAS uses an integrating sphere to disk-integrate light from the Solar System planets, producing spatially mixed light more similar to the spectra we can obtain from exoplanets. This paper describes the general system design and early results of the PEAS instrument.

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Emily C. Martin, Andrew J. Skemer, Matthew V. Radovan, Steven L. Allen, David Black, William T. S. Deich, Jonathan J. Fortney, Gabriel Kruglikov, Nicholas MacDonald, David Marques, Evan C. Morris, Andrew C. Phillips, Dale Sandford, Julissa Villalobos Valencia, Jason J. Wang, and Pavl Zachary "The Planet as Exoplanet Analog Spectrograph (PEAS): design and first-light", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114470T (15 December 2020); https://doi.org/10.1117/12.2560706

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