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.
@article{arxiv.2208.13863,
title = {GPI 2.0: Characterizing Self-Luminous Exoplanets Through Low-Resolution Infrared Spectroscopy},
author = {Arlene Aleman and Bruce Macintosh and Mary Anne Limbach and Mark Marley and Jeffrey Chilcote and Quinn Konopacky and Dmitry Savransky},
journal= {arXiv preprint arXiv:2208.13863},
year = {2022}
}
Comments
11 pages, 10 figures, to be published in proceedings for SPIE Astronomical Telescopes + Instrumentation 2022