Density waves in the solar nebula - Differential Lindblad torque

Details Density waves in the solar nebula - Differential Lindblad torque Density waves in the solar nebula - Differential Lindblad torque

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...67..164w&link_type=abstract

Icarus (ISSN 0019-1035), vol. 67, July 1986, p. 164-180.

Computer Science

Sound

216

Accretion Disks, Density Wave Model, Orbit Perturbation, Planetary Evolution, Protoplanets, Solar Corona, Drift Rate, Orbit Decay, Resonance, Torque

Scientific paper

The differential torque exerted by Lindblad resonances on a perturbing object embedded in a two-dimensional nonself-gravitating disk with density, pressure and sound speed gradients is quantified. First-order corrections are made to account for Keplerian rotation and the presence of the gradients. The total torque is calculated by summing over all resonances in the absence of local wave damping. When applied to the primordial solar nebula disk, the calculations show that disks that cool with increasing heliocentric distance will cause decay of the orbit of the perturbing object. Conditions in which the perturber will escape orbit delay are also described. The characteristic drift time will be no greater than the stochastic accretion time scales. Implications of the calculations for planetary formation are discussed.

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