Extrasolar Planets: New Insights from New Data

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Approximately 300 exoplanets, mostly giant planets in the Jovian mass range, but also more than 40 "Neptune-mass" planets, have been detected orbiting stars in the solar neighborhood. More than 15% of them are transiting their primaries and these have collectively yielded a wealth of structural and physical information which theorists are scrambling to interpret. Amazingly, a number of these giant planets have recently been detected directly by the Spitzer infrared space telescope. These constitute the first remote-sensing data of extrasolar worlds. I will present the embryonic theory of such irradiated giant planets and discuss what we have learned about their atmospheres and origin. We are witnessing the birth of a new astronomical discipline and I will attempt to describe its first halting steps on the scientific stage.

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