How would a ring around an extrasolar planet change the unresolved planet photometry ?

Details How would a ring around an extrasolar planet change the unresolved planet photometry ? How would a ring around an extrasolar planet change the unresolved planet photometry ?

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf...61a&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Astronomy and Astrophysics

Astrophysics

Scientific paper

The next generation of high-contrast imaging instruments will deliver the first unresolved image of an extrasolar planet. While the emitted infrared light from the planet in thermal equilibrium should show no phase effect, the reflected visible light will vary with the orbital phase angle. We study the photometric variation of the reflected light with orbital phase of a ringed extrasolar planet. We show that a ring around an extrasolar planet, both obviously unresolved, can be detected by its specific photometric signature. A simple quantitative model is discussed, taking into account the basic optical and geometrical properties of the ringed planet.

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