Hydrodynamic instability of the solar nebula in the presence of a planetary core

Physics – Condensed Matter

Scientific paper

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Astronomical Models, Flow Stability, Gravitational Effects, Planetary Evolution, Solar System, Adiabatic Conditions, Angular Velocity, Boundary Value Problems, Condensing, Envelopes, Gas Dynamics, Hydrodynamics, Jupiter (Planet), Nebulae, Planetary Mass, Saturn (Planet)

Scientific paper

When a planetary core composed of condensed matter accumulates in the primitive solar nebula, the gas in the nebula becomes gravitationally concentrated as an envelope about the planetary core. An analysis of models of such gaseous envelopes indicates that giant planets (such as Jupiter and Saturn) formed in a massive primitive solar nebula of the type constructed by Cameron and Pine (1973). When the mass of the accumulating planetary core becomes sufficiently great, the surrounding gaseous envelope will become hydrodynamically unstable against collapse onto the planetary core. Much of the surrounding gas also may be compressed onto the core by the background pressure of the gas.

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