The influence of dust upon the dynamics and stability of planetary nebulae. II

Details The influence of dust upon the dynamics and stability of planetary nebulae. II The influence of dust upon the dynamics and stability of planetary nebulae. II

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...193..693h&link_type=abstract

Astrophysical Journal, vol. 193, Nov. 1, 1974, pt. 1, p. 693-698.

Astronomy and Astrophysics

Astrophysics

1

Cosmic Dust, Flow Equations, Gravitational Effects, Numerical Integration, Planetary Nebulae, Thermal Instability, Astronomical Models, Cooling, Gas Expansion, Interstellar Gas, Nonlinear Equations, Radiation Distribution, Steady Flow, Structural Stability

Scientific paper

It is shown by a simultaneous integration of the nonlinear equations governing the thermal behavior of 'perturbed' regions, assumed to be in pressure equilibrium with the unperturbed flow in a planetary nebula, that, following the uncoupling of the radiation field in the nebular shell with the gas, large-scale density and temperature inhomogeneities can develop between the two components due to a combination of grain and O I cooling. Furthermore, the possible development of gravitational instabilities in a nebula during the early phases of evolution are considered.

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