Photometric Phase Variations of Long-Period Eccentric Planets

Abstract

The field of exoplanetary science has diversified rapidly over recent years as the field has progressed from exoplanet detection to exoplanet characterization. For those planets known to transit, the primary transit and secondary eclipse observations have a high yield of information regarding planetary structure and atmospheres. The current restriction of these information sources to short-period planets may be abated in part through refinement of orbital parameters. This allows precision targeting of transit windows and phase variations which constrain the dynamics of the orbit and the geometric albedo of the atmosphere. Here we describe the expected phase function variations at optical wavelengths for long-period planets, particularly those in the high-eccentricity regime and multiple systems in resonant and non-coplanar orbits. We apply this to the known exoplanets and discuss detection prospects and how observations of these signatures may be optimized by refining the orbital parameters.

9 pages, 8 figures, accepted for publication in ApJ

References in corpus (10)

• Multi-Wavelength Constraints on the Day-Night Circulation Patterns of HD 189733b
• The phase-dependent Infrared brightness of the extrasolar planet upsilon Andromedae b
• The Very Low Albedo of an Extrasolar Planet: MOST Spacebased Photometry of HD 209458
• Inverting Phase Functions to Map Exoplanets
• Hot Nights on Extrasolar Planets: Mid-IR Phase Variations of Hot Jupiters
• Optical Albedo Theory of Strongly-Irradiated Giant Planets: The Case of HD 209458b
• HD 17156b: A Transiting Planet with a 21.2 Day Period and an Eccentric Orbit
• Constraining Orbital Parameters Through Planetary Transit Monitoring
• HD 75289Ab revisited - Searching for starlight reflected from a hot Jupiter
• Detectability and Error Estimation in Orbital Fits

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