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Directly imaged exoplanets in reflected starlight: The importance of knowing the planet radius

Carrión González, Oscar and Garcia Munoz, A. and Cabrera Perez, Juan and Csizmadia, Szilard and Santos, N. C. and Rauer, H (2020) Directly imaged exoplanets in reflected starlight: The importance of knowing the planet radius. XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society, 13-15 July 2020, virtual.

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Abstract

Direct-imaging will be a key technique to characterize the atmospheres of non-transiting exoplanets. Space telescopes using this method are planned to be launched in this decade and several works are trying to predict their science outcome through retrieval exercises. Here we present an atmospheric model and a retrieval package that we developed to study how different planet and atmospheric parameters affect the reflected-light spectra that will be measured. We find that our knowledge of the planet radius will play a major role in the atmospheric characterization. For instance, if the value of the planet radius (Rp) is unknown, it will be challenging to distinguish between cloudy and cloud-free atmospheres. We therefore conclude that Rp, a parameter which was not considered in previous studies of direct-imaging observations, should be included in future retrieval exercises of this type.

Item URL in elib:https://elib.dlr.de/137211/
Document Type:Conference or Workshop Item (Speech)
Title:Directly imaged exoplanets in reflected starlight: The importance of knowing the planet radius
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Carrión González, OscarTU BerlinUNSPECIFIED
Garcia Munoz, A.Zentrum fuer Astronomie und Astrophysik, Technische Universitaet Berlin, GermanyUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
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, PortugalUNSPECIFIED
Rauer, Hheike.rauer (at) dlr.deUNSPECIFIED
Date:July 2020
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:exoplanets, direct imaging
Event Title:XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society
Event Location:virtual
Event Type:international Conference
Event Dates:13-15 July 2020
Organizer:SEA
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 (old)
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:06 Nov 2020 10:05
Last Modified:06 Nov 2020 10:05

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