학술논문

GPI 2.0: Characterizing Self-Luminous Exoplanets Through Low-Resolution Infrared Spectroscopy
Document Type
Working Paper
Source
Subject
Astrophysics - Earth and Planetary Astrophysics
Astrophysics - Instrumentation and Methods for Astrophysics
Language
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.
Comment: 11 pages, 10 figures, to be published in proceedings for SPIE Astronomical Telescopes + Instrumentation 2022