TY - JOUR
T1 - Exoplanet Reflected-light Spectroscopy with
AU - Batalha, Natasha E.
AU - Marley, Mark S.
AU - Lewis, Nikole K.
AU - Fortney, Jonathan J.
N1 - Publisher Copyright:
© 2019. The American Astronomical Society. All rights reserved.
PY - 2019/6/10
Y1 - 2019/6/10
N2 - Here we present the first open-source radiative transfer model for computing the reflected light of exoplanets at any phase geometry, called PICASO: the planetary intensity code for atmospheric scattering observations. This code, written in Python, has heritage from a decades-old, well-known Fortran model used for several studies of planetary objects within the solar system and beyond. We have adopted it to include several methodologies for computing both direct and diffuse-scattering phase functions, and have added several updates including the ability to compute Raman scattering spectral features. Here we benchmark PICASO against two independent codes and discuss the degree to which the model is sensitive to a user's specification for various phase functions. Then, we conduct a full information-content study of the model across a wide parameter space in temperature, cloud profile, signal-to-noise ratio, and resolving power.
AB - Here we present the first open-source radiative transfer model for computing the reflected light of exoplanets at any phase geometry, called PICASO: the planetary intensity code for atmospheric scattering observations. This code, written in Python, has heritage from a decades-old, well-known Fortran model used for several studies of planetary objects within the solar system and beyond. We have adopted it to include several methodologies for computing both direct and diffuse-scattering phase functions, and have added several updates including the ability to compute Raman scattering spectral features. Here we benchmark PICASO against two independent codes and discuss the degree to which the model is sensitive to a user's specification for various phase functions. Then, we conduct a full information-content study of the model across a wide parameter space in temperature, cloud profile, signal-to-noise ratio, and resolving power.
KW - planetary systems
KW - techniques: spectroscopic
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U2 - 10.3847/1538-4357/ab1b51
DO - 10.3847/1538-4357/ab1b51
M3 - Article
AN - SCOPUS:85069512317
SN - 0004-637X
VL - 878
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 70
ER -