Inner structure determination of transiting close-in planets - - PowerPoint PPT Presentation

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Inner structure determination of transiting close-in planets - - PowerPoint PPT Presentation

Mar 20, 2023 141 likes •311 views

Inner structure determination of transiting close-in planets Alexandre C.M. Correia (Univ. Aveiro / IMCCE - Obs. Paris) Twenty years of giant exoplanets OHP 2015 - 9 th October 2015 Tidal effect P orb = P rot Case of the Moon and

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“Inner structure determination

  • f transiting close-in planets”

Alexandre C.M. Correia

Twenty years of giant exoplanets

OHP 2015 - 9th October 2015

(Univ. Aveiro / IMCCE - Obs. Paris)

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Tidal effect

circular orbits

Porb = Prot

pependicular axis Case of the Moon and remaining satellites of the Solar System

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Tidal ellipsoid

X Y Z R

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Love number approach

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ellipsoid transit

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Wasp-12

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Wasp-19

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Wasp-4

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Kepler-78

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Density determination theoretical estimation

Jupiter-like: hf ≈ 1.5 Earth-like: hf ≈ 2.0

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Density determination

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Conclusions

  • The ellipsoidal shape of close-in planets

can significantly differ from a sphere, which modifies the transit light curves.

  • The differences in the light curve are

larger than previously thought. When detectable, they provide us invaluable information on the internal structure.

  • The bulk density of these planets can be

up to 15% smaller than current estimates

  • btained assuming a spherical radius.