Bonn 2020 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 13: Exoplanets and Astrobiology
EP 13.7: Talk
Friday, April 3, 2020, 11:45–12:00, H-HS VIII
On the interior of exoplanets with the Love number h2 — •Hugo Hellard and Szilárd Csizmadia — DLR Berlin, Germany
The characterization of the interior of exoplanets will unveil precious information on their formation, structure, and evolution. The Love numbers h2 and k2, which describe the planet’s response to external perturbations, contain information beyond the planetary mean density (e.g., radial density profile, rheological properties). Their knowledge will decrease the intrinsic degeneracy of the mass-radius diagram. While Love numbers are known for several Solar System bodies, they remain unmeasured for exoplanets. First, we introduce both Love numbers and summarize how h2 can be directly measured from (exo)planetary transit light curves. Second, we present the capability of the Hubble Space Telescope to measure h2 of the hot-Jupiter WASP-121b before the high-quality data to be returned by the James Webb Telescope and the PLATO telescope in the next decade.