Extrasolar planets

Details Extrasolar planets Extrasolar planets

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aabb.book..281j&link_type=abstract

In: Advances in astronomy. Editor: J. M. T. Thompson. Royal Society Series on Advances in Science, Vol. 1. London: Imperial Coll

Astronomy and Astrophysics

Astronomy

Extrasolar Planets

Scientific paper

More than one hundred planets are known outside our solar system. These extrasolar planets have been found in orbit around stars ranging from spectral type F to M with semi-major axes ranging from 0.02 to 6 au (1 au = Earth-Sun distance). Their masses range from around 0.1 to 10 Jupiter masses, though mass values are usually somewhat ambiguous because of the unknown inclination of their orbits. Migration theory suggests that planets of Jupiter-like mass are to be found at Jupiter-like distances, though so far we have primarily detected an important minority at smaller radii. The extrasolar planets discovered thus far are found around primary stars with a particularly high metal content, that may increase towards shorter periods and thus correlate with greater migration. One of the most enigmatic results is the high eccentricities of extrasolar planets in comparison with the Solar System. As time goes by our searches become ever more sensitive to a wider range of primaries with lower mass and longer period extrasolar planets. We are now at the beginning of a new adventure: the search for planetary systems that are more like our own.

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