Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dps....37.2916t&link_type=abstract
American Astronomical Society, DPS meeting #37, #29.16; Bulletin of the American Astronomical Society, Vol. 37, p.676
Astronomy and Astrophysics
Astronomy
Scientific paper
We here propose a new scenario for the formation of giant planets. This scenario could occur in planetary systems born in a dense star cluster (e.g., OB association), where is it believed that up to 90% of star formation occurs. Our scenario has three phases. First, a rocky core forms in < 1 Myr. Second, the disk's gas is lost due to photo-evaporation from a recently-started young O or B star. Third, as the low-mass star orbits the cluster, its disk accretes gas from the ISM, via Bondi-Hoyle accretion, sufficient to form the planet's gas envelope. A typical star-disk system could accrete approximately 0.1 solar masses of material in 1 Myr. We will present a model of this formation mechanism and discuss its consequences.
Bally John
Throop Henry B.
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