Forming a Jupiter-like Companion for 51 Pegasi

Details Forming a Jupiter-like Companion for 51 Pegasi Forming a Jupiter-like Companion for 51 Pegasi

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..139b&link_type=abstract

Lunar and Planetary Science, volume 27, page 139

Computer Science

9

Jupiter, Nebulae: Solar, Planets: Formation

Scientific paper

The recent discovery of a likely Jupiter-mass planetary companion to the star 51 Pegasi was startling because the 4.23 day period of the companion implies an orbital separation of only 0.05 AU from 51 Pegasi. If the companion is a gas giant planet formed by the mechanism believed to be responsible for the formation of Jupiter, then the companion to 51 Pegasi could not have formed at its present distance from 51 Pegasi. Radiative hydrodynamical models of protoplanetary disks show that any Jupiter-like planet must have formed at a distance from 51 Pegasi similar to that of Jupiter from our Sun, and then been dragged much closer to 51 Pegasi. Gravitational interactions with a long-lived protoplanetary disk provide an attractive means for accomplishing this planetary migration. Such a scenario implies that any Earth-like planets that also formed around 51 Pegasi disappeared into the central star long ago.

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