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The variation of T_eq for the exoplanets detectable by Roman in direct imaging: a catalogue of targets

Carrión González, Oscar and Garcia Munoz, A. and Santos, N. C. and Cabrera Perez, Juan and Csizmadia, Szilard and Rauer, Heike (2021) The variation of T_eq for the exoplanets detectable by Roman in direct imaging: a catalogue of targets. Habitable Worlds, 22.-26.02.2021, virtuell.

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The Roman Space Telescope will be the first mission to analyse exoplanets by directly imaging them in reflected starlight. This technique will enable the atmospheric characterization of long-period planets which cannot be studied by current facilities. In this work, we analysed the exoplanet detection yield of the Roman Space Telescope's coronagraph instrument (CGI). For that, we explored the NASA Exoplanet Archive and computed, for all confirmed exoplanets, 10000 possible orbital realizations based on their Keplerian parameters and corresponding uncertainties. We define a planet as Roman-accessible on the basis of the intrument's inner and outer working angles and its minimum planet-to-star constrast (IWA, OWA, Cmin). We adopt for these technical specifications three plausible configurations, labeled as pessimistic, intermediate and optimistic. Our key outputs for each exoplanet are its probability of being Roman-accessible (Paccess), the range of observable phase angles, the evolution of its equilibrium temperature, the number of days per orbit that it is accessible and its transit probability. In the optimistic scenario, we find 26 Roman-accessible exoplanets with Paccess>25% and orbiting stars brighter than V=7 mag. The number of Roman-accessible planets drops to 10 and 3 in the intermediate and pessimistic scenarios, respectively. We find that the orbits of these planets have larger eccentricities than the orbits of those characterized so far in transit. This results in large variations of the equilibrium temperature along the orbit, which may affect the atmospheric structure.

Item URL in elib:https://elib.dlr.de/142433/
Document Type:Conference or Workshop Item (Poster)
Title:The variation of T_eq for the exoplanets detectable by Roman in direct imaging: a catalogue of targets
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:February 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:direct imaging exoplanets
Event Title:Habitable Worlds
Event Location:virtuell
Event Type:international Conference
Event Dates:22.-26.02.2021
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:31 May 2021 10:14
Last Modified:31 May 2021 10:14

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