Detectability of extrasolar planetary transits

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Astronomical Photometry, Detection, Extrasolar Planets, Planet Ephemerides, Stellar Luminosity, Stellar Occultation, Dwarf Stars, Planetary Systems, Solar Flux, Solar Maximum Mission, Stellar Activity

Scientific paper

Precise stellar photometry can be used to detect other planetary systems. However, the intrinsic variability of stellar luminosity imposes a fundamental limit on the sensitivity of this method. Based on recent precise solar observations made from the Solar Maximum Mission satellite, it appears that the detection of earth-sized planets will be marginal during periods of high stellar activity. However, with a suitable photometer larger planets should be readily detectable even in the presence of stellar activity equal to that of the sun at the peak of its sunspot cycle. The high precision, multiple-star photometric system required to detect planets in other stellar systems could be used to monitor flares, starspots, and global oscillations.

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