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Main Title: Mass-radius relationships of rocky exoplanets
Author(s): Sohl, Frank
Wagner, Frank W.
Rauer, Heike
Type: Article
Language Code: en
Abstract: Mass and radius of planets transiting their host stars are provided by radial velocity and photometric observations. Structural models of solid exoplanet interiors are then constructed by using equations of state for the radial density distribution, which are compliant with the thermodynamics of the high-pressure limit. However, to some extent those structural models suffer from inherent degeneracy or non-uniqueness problems owing to a principal lack of knowledge of the internal differentiation state and/or the possible presence of an optically thick atmosphere. We here discuss the role of corresponding measurement errors, which adversely affect determinations of a planet's mean density and bulk chemical composition. Precise measurements of planet radii will become increasingly important as key observational constraints for radial density models of individual solid low-mass exoplanets or super-Earths.
Issue Date: 2012
Date Available: 27-Nov-2017
DDC Class: 520 Astronomie und zugeordnete Wissenschaften
526 Mathematische Geografie
Subject(s): planets
bulk composition
interior structure
Journal Title: Proceedings of the International Astronomical Union
Publisher: Cambridge University Press
Publisher Place: Cambridge
Volume: 8
Issue: S293
Publisher DOI: 10.1017/s1743921313013148
Page Start: 350
Page End: 355
EISSN: 1743-9221
ISSN: 1743-9213
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:Zentrum für Astronomie und Astrophysik » Publications

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