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Retrieval of the fluid Love number k2 in transit light curves: a feasibility study

Hellard, Hugo and Csizmadia, Szilard and Rauer, H (2019) Retrieval of the fluid Love number k2 in transit light curves: a feasibility study. EPSC-DPS Joint Meeting 2019, Geneva, Switzerland.

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Abstract

With about 4000 confirmed detected exoplanets, the characterization of their interior could potentially unveil information on their formation, migration, and habitability. The Love number k2, when hydrostatic equilibrium of the interior is assumed, is an indication of mass concentration towards the body's center. Hence, it helps to further constrain the interior when combined with planetary mass and mean radius. We first summarize the planetary shape model which allows the retrieval of k2 from transit light curves. Second, we apply our model to synthetic data of WASP-121b and show that a precision < 90 ppm/min is required to reliably retrieve k2 with present understanding of stellar limb darkening. Therefore we improve recent results based on ellipsoidal shape models.

Item URL in elib:https://elib.dlr.de/131803/
Document Type:Conference or Workshop Item (Speech)
Title:Retrieval of the fluid Love number k2 in transit light curves: a feasibility study
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hellard, HugoHugo.Hellard (at) dlr.deUNSPECIFIED
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
Rauer, Hheiker.rauer (at) dlr.deUNSPECIFIED
Date:2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:exoplanets planetary interiors Love number
Event Title:EPSC-DPS Joint Meeting 2019
Event Location:Geneva, Switzerland
Event Type:international Conference
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 - Projekt COROT Beteiligung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Csizmadia, Szilard
Deposited On:02 Dec 2019 11:42
Last Modified:06 Feb 2020 10:53

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