GPI 2.0: characterizing self-luminous exoplanets through low-resolution infrared spectroscopy

Arlene J. Alemán; Bruce Macintosh; Mary Anne Limbach; Mark S. Marley; Jeffrey K. Chilcote; Quinn Konopacky; Dmitry Savransky

doi:10.1117/12.2630793

29 August 2022 GPI 2.0: characterizing self-luminous exoplanets through low-resolution infrared spectroscopy

Arlene J. Alemán, Bruce Macintosh, Mary Anne Limbach, Mark S. Marley, Jeffrey K. Chilcote, Quinn Konopacky, Dmitry Savransky

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121844B (2022) https://doi.org/10.1117/12.2630793
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Direct imaging characterization of extrasolar planets is often done at low spectral resolution. We model the spectrograph for the Gemini Planet Imager upgrade (GPI 2.0) and assess the instrument’s potential for allowing observers to constrain exoplanet properties through analysis of near-infrared spectra. We simulated noisy observations followed by calculations of posterior distributions from maximum likelihood comparison with the Sonora 2018 model grid. Preliminary results suggest that GPI 2.0 should allow observers to constrain temperature with sufficient accuracy, but gravity remains largely uncertain. We also explore the effects of incorporating convolution with the instrument line spread function into our simulation and compare the results with our preliminary findings.

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Arlene J. Alemán, Bruce Macintosh, Mary Anne Limbach, Mark S. Marley, Jeffrey K. Chilcote, Quinn Konopacky, and Dmitry Savransky "GPI 2.0: characterizing self-luminous exoplanets through low-resolution infrared spectroscopy", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121844B (29 August 2022); https://doi.org/10.1117/12.2630793

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