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Statistical Properties of Extrasolar Planets

  • R. Paul Butler (a1), Geoffrey W. Marcy (a2), Debra A. Fischer (a2), Steven S. Vogt (a3), C. G. Tinney (a4), Hugh R. A. Jones (a5), Alan J. Penny (a6) and Kevin Apps (a7)...

Abstract

The emerging statistical properties from the first 50 extrasolar planets are startlingly different from the picture that was imagined prior to 1995. About 0.75% of nearby solar type stars harbor jovian planets in 3 to 5 day circular orbits. Another ∽7% of stars have jupiter–mass companions orbiting in eccentric orbits within 3.5 AU. The mass distribution of substellar companions rises abruptly near 5 MJup and continues increasing down to the detection limit near 1 MJup-Orbital eccentricities correlate positively with semimajor axes, even for planets beyond the tidal circularization zone within 0.1 AU, distinguishing planets from binary stars. The planet bearing stars are metal–rich relative to both nearby stars and to the Sun. Analogs of Solar System planets have not been detected to date as they require precision of 3 m s−1 maintained for more than a decade.

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References

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