EVAPORATION OF ICY PLANETESIMALS DUE TO BOW SHOCKS
- Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819 (Japan)
- Department of Earth Sciences, Tohoku University, Sendai 980-8578 (Japan)
- Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)
We present the novel concept of evaporation of planetesimals as a result of bow shocks associated with planetesimals orbiting with supersonic velocities relative to the gas in a protoplanetary disk. We evaluate the evaporation rates of the planetesimals based on a simple model describing planetesimal heating and evaporation by the bow shock. We find that icy planetesimals with radius {approx}>100 km evaporate efficiently even outside the snow line in the stage of planetary oligarchic growth, where strong bow shocks are produced by gravitational perturbations from protoplanets. The obtained results suggest that the formation of gas giant planets is suppressed owing to insufficient accretion of icy planetesimals onto the protoplanet within the {approx}<5 AU disk region.
- OSTI ID:
- 22167755
- Journal Information:
- Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 764; ISSN ASJOAB; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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