Exoplanet Reflected Light Spectroscopy with PICASO

Abstract

Here we present the first open-source radiative transfer model for computing the reflected light of exoplanets at any phase geometry, called PICASO: 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, SNR and resolving power.

Accepted ApJ; GitHub: https://github.com/natashabatalha/picaso Docs: https://natashabatalha.github.io/picaso/ Radiative Transfer Tutorial: https://natashabatalha.github.io/picaso_dev

References in corpus (43)

• The NumPy array: a structure for efficient numerical computation
• Precipitating Condensation Clouds in Substellar Atmospheres
• A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
• The Indo-U.S. Library of Coude Feed Stellar Spectra
• A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
• Line and Mean Opacities for Ultracool Dwarfs and Extrasolar Planets
• Neglected Clouds in T and Y Dwarf Atmospheres
• Atmospheric Retrieval for Super-Earths: Uniquely Constraining the Atmospheric Composition with Transmission Spectroscopy
• Clouds and Chemistry: Ultracool Dwarf Atmospheric Properties from Optical and Infrared Colors
• Planetary Spectrum Generator: an accurate online radiative transfer suite for atmospheres, comets, small bodies and exoplanets
• Reflected Spectra and Albedos of Extrasolar Giant Planets I: Clear and Cloudy Atmospheres
• Inference of Inhomogeneous Clouds in an Exoplanet Atmosphere
• Tau-REx I: A next generation retrieval code for exoplanetary atmospheres
• Comparative Planetary Atmospheres: Models of TrES-1 and HD209458b
• Changing Phases of Alien Worlds: Probing Atmospheres of Kepler Planets with High-Precision Photometry
• A consistent retrieval analysis of 10 Hot Jupiters observed in transmission
• The Deep Blue Color of HD189733b: Albedo Measurements with Hubble Space Telescope/Space Telescope Imaging Spectrograph at Visible Wavelengths
• Exoplanet albedo spectra and colors as a function of planet phase, separation, and metallicity
• Information Content of Exoplanetary Transit Spectra: An Initial Look
• Analytic models for albedos, phase curves and polarization of reflected light from exoplanets
• Forward modelling and retrievals with PLATON, a fast open source tool
• Characterizing Earth Analogs in Reflected Light: Atmospheric Retrieval Studies for Future Space Telescopes
• Phase Functions and Light Curves of Wide Separation Extrasolar Giant Planets
• Strategies for Constraining the Atmospheres of Temperate Terrestrial Planets with JWST
• Clouds on the hot Jupiter HD189733b: constraints from the reflection spectrum
• Toward the analysis of JWST exoplanet spectra: Identifying troublesome model parameters
• Sulfur Hazes in Giant Exoplanet Atmospheres: Impacts on Reflected Light Spectra
• Probable detection of hydrogen sulphide (H${}_2$S) in Neptune's atmosphere
• Information Content Analysis for Selection of Optimal JWST Observing Modes for Transiting Exoplanet Atmospheres
• Developing Atmospheric Retrieval Methods for Direct Imaging Spectroscopy of Gas Giants in Reflected Light I: Methane Abundances and Basic Cloud Properties
• Uranus at equinox: Cloud morphology and dynamics
• Abundance Measurements of Titan's Stratospheric HCN, HC${}_3$N, C${}_3$H${}_4$, and CH${}_3$CN from ALMA Observations
• Probing exoplanet clouds with optical phase curves
• Atmospheric Retrieval for Direct Imaging Spectroscopy of Gas Giants In Reflected Light II: Orbital Phase and Planetary Radius
• Accurate and Approximate Calculations of Raman Scattering in the Atmosphere of Neptune
• An Information-Theoretic Approach to Optimize JWST Observations and Retrievals of Transiting Exoplanet Atmospheres
• Characterization of Exoplanet Atmospheres with the Optical Coronagraph on WFIRST
• Color Classification of Extrasolar Giant Planets: Prospects and Cautions
• Reflected Light Curves, Spherical and Bond Albedos of Jupiter- and Saturn-like Exoplanets
• Exploring H${}_2$O Prominence in Reflection Spectra of Cool Giant Planets
• Dynamic mineral clouds on HD 189733b II. Monte Carlo radiative transfer for 3D cloudy exoplanet atmospheres: combining scattering and emission spectra
• Raman Scattering by Molecular Hydrogen and Nitrogen in Exoplanetary Atmospheres
• How does the shape of the stellar spectrum affect the Raman scattering features in the albedo of exoplanets?

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