Radial Velocity Detections of Extra-Solar Planets
The frequency of planetary systems orbiting other solar-type stars is one of the most fundamental problems in Astronomy. For example, finding extrasolar planets will improve dramatically our understanding of the formation of planets and planetary systems, which was based till the last decade on the sole example of the solar system. Nevertheless, no extra-solar planet was convincingly detected until recently. This is so because planets are very faint relative to their parent stars, with brightness ratios that can get as low as 10−8—the luminosity ratio for the case of Jupiter and the Sun. With present technology it is therefore next to impossible to image directly any extra-solar planet residing inside the overpowering glare of its parent star.
KeywordsRadial Velocity Circular Orbit Giant Planet Eccentric Orbit Extrasolar Planet
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