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Reflected-starlight phase curves: an observing strategy to constrain the radius and atmospheric properties of directly imaged exoplanets

Carrión González, Oscar and Garcia Munoz, A. and Santos, N. C. and Cabrera Perez, Juan and Csizmadia, Szilard and Rauer, Heike (2021) Reflected-starlight phase curves: an observing strategy to constrain the radius and atmospheric properties of directly imaged exoplanets. EPSC, 13.-24.09.2021, virtual meeting. doi: 10.5194/epsc2021-694.

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Official URL: https://meetingorganizer.copernicus.org/EPSC2021/EPSC2021-694.html


The Nancy Grace Roman Space Telescope, to be launched in 2025, will directly image exoplanets in reflected starlight for the first time. This observing technique will enable the study of a population of exoplanets whose atmospheres cannot be characterized with current techniques. Previous works have analysed the possible science outcome of reflected-starlight observations through atmospheric retrievals. These have shown that an accurate atmospheric characterization from a reflected-light spectrum will likely be hindered if the radius and the atmospheric properties (e.g. cloud properties) of the exoplanet are unknown a priori. In this work we study how different observing strategies can improve the atmospheric characterization in such cases. We conclude that combining measurements at different star-planet-observer phase angles is a powerful strategy to better characterize the atmosphere of an exoplanet and constrain its radius.

Item URL in elib:https://elib.dlr.de/144451/
Document Type:Conference or Workshop Item (Speech)
Title:Reflected-starlight phase curves: an observing strategy to constrain the radius and atmospheric properties of directly imaged exoplanets
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Garcia Munoz, A.AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, Francehttps://orcid.org/0000-0003-1756-4825UNSPECIFIED
Santos, N. C.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal; Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, PortugalUNSPECIFIEDUNSPECIFIED
Cabrera Perez, JuanUNSPECIFIEDhttps://orcid.org/0000-0001-6653-5487UNSPECIFIED
Rauer, HeikeUNSPECIFIEDhttps://orcid.org/0000-0002-6510-1828UNSPECIFIED
Date:13 September 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:EPSC2021-694
Series Name:EPSC Abstracts
Keywords:direct imaging exoplanets
Event Title:EPSC
Event Location:virtual meeting
Event Type:international Conference
Event Dates:13.-24.09.2021
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Cabrera Perez, Juan
Deposited On:13 Oct 2021 08:26
Last Modified:13 Oct 2021 08:26

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