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2001MNRAS.325..221P - Mon. Not. R. Astron. Soc., 325, 221-230 (2001/July-3)
Dynamical relaxation and massive extrasolar planets.
PAPALOIZOU J.C.B. and TERQUEM C.
Abstract (from CDS):
Under a wide range of initial conditions and assumptions, the relaxation process ends with either (i) one potential `hot Jupiter' plus up to two `external' companions, i.e. planets orbiting near the outer edge of the initial distribution; (ii) one or two `external' planets or even none at all; (iii) one planet on an orbit with a semi-major axis of 10 to 100 times smaller than the outer boundary radius of the inital distribution together with an `external' companion. Most of the other objects are ejected and could contribute to a population of free-floating planets. Apart from the potential `hot Jupiters', all the bound objects are on orbits with high eccentricity, and also with a range of inclination with respect to the stellar equatorial plane. We found that, apart from the close orbiters, the probability of ending up with a planet orbiting at a given distance from the central star increases with the distance. This is because of the tendency of the relaxation process to lead to collisions with the central star. The scenario we envision here does not impose any upper limit on the mass of the planets. We discuss the application of these results to some of the more massive extrasolar planets.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): celestial mechanics - planetary systems: formation - planetary systems: protoplanetary discs
Simbad objects: 8
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