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F. Combes, D. Barret, T. Contini, F. Meynadier and L. Pagani (eds) HOW WOULD A RING AROUND AN EXTRASOLAR PLANET
 

Summary: SF2A 2004
F. Combes, D. Barret, T. Contini, F. Meynadier and L. Pagani (eds)
HOW WOULD A RING AROUND AN EXTRASOLAR PLANET
CHANGE THE UNRESOLVED PLANET PHOTOMETRY ?
Arnold, L.1 and Schneider, J.2
Abstract. The next generation of high-contrast imaging instruments will
provide 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.
1 Introduction
The discovery of extrasolar planets by radial velocity measurements has provided
the first dynamical characteristics of planets (orbital elements and mass). The next
step will be to investigate physical characteristics (albedo, temperature, radius
etc.) and planet surroundings. Among the latter are planetary rings. Coming
space or ground-based high-contrast imaging instruments will be able to provide
the first image of an unresolved extrasolar planet, in the thermal infrared or in the

  

Source: Arnold, Luc - Observatoire de Haute-Provence

 

Collections: Physics