Physics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.353..827l&link_type=abstract
Nature (ISSN 0028-0836), vol. 353, Oct. 31, 1991, p. 827-829. Research supported by NASA and NSF.
Physics
62
Extrasolar Planets, Planetary Evolution, Pulsars, Stellar Orbits, Supernova Remnants, Accretion Disks, Angular Momentum, Circular Orbits, Gamma Ray Bursts, Protoplanets
Scientific paper
How the 10-earth mass planet in a nearly circular 0.7 AU orbit around PSR1829 - 10 might have been created inside the young SNR is described. It is proposed that the planet formed from a rotationally supported disk of about 0.02 solar mass of heavy elements that fell back from the supernova explosion to an initial radius of about 1000 km. Viscous evolution of the disk then concentrated most of its angular momentum into a small amount of material at the disk's outer extremity: 10 earth masses at 10 exp 13 cm. Here, dust grains that had condensed and precipitated toward the midplane grew through cohesive collisions and gravitational instabilities into 100-km planetesimals which coagulated into the planet on a million-yr time scale. The presence of a more massive and more distant second planet is found to be unlikely.
Bodenheimer Peter H.
Lin Doug N. C.
Woosley Stan E.
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