Orbital migration of the planetary companion of 51 Pegasi to its present location View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1996-04

AUTHORS

D. N. C. Lin, P. Bodenheimer, D. C. Richardson

ABSTRACT

THE recent discovery1 and confirmation2 of a possible planetary companion orbiting the solar-type star 51 Pegasi represent a breakthrough in the search for extrasolar planetary systems. Analysis of systematic variations in the velocity of the star indicate that the mass of the companion is approximately that of Jupiter, and that it is travelling in a nearly circular orbit at a distance from the star of 0.05 AU (about seven stellar radii). Here we show that, if the companion is indeed a gas-giant planet, it is extremely unlikely to have formed at its present location. We suggest instead that the planet probably formed by gradual accretion of solids and capture of gas at a much larger distance from the star (∼5 AU), and that it subsequently migrated inwards through interactions with the remnants of the circumstellar disk. The planet's migration may have stopped in its present orbit as a result of tidal interactions with the star, or through truncation of the inner circumstellar disk by the stellar magnetosphere. More... »

PAGES

606-607

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/380606a0

DOI

http://dx.doi.org/10.1038/380606a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1027819144


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