Models of planetary nebulae with dust

Journal Article · Sat Nov 01 04:00:00 EST 1975 · Astrophysical Journal

DOI:https://doi.org/10.1086/153964· OSTI ID:4111946

Ferch, R. L.; Salpeter, E. E.

Computer models have been constructed of planetary nebulae of 0.15 and 0.5 M_sun total mass, containing varying amounts of absorption dust grains. In all cases the dust remained well mixed with the gas, and was responsible for the maintenance of a well-defined inner edge for the nebular shell. Once the nebula was ionized, the expansion in the outer regions accelerated due to pressure gradients, so that the observed mass decreased with time. The more massive nebulae were found to expand more slowly. Even when all of the Lα radiation was absorbed by grains, it was not as important for grain heating and acceleration as the direct stellar radiation. Agreement with several aspects of recent infrared observations was obtained.

• Research Organization: Center for Radiophysics and Space Research, Cornell University
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-018204
• OSTI ID: 4111946
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Vol. 202; ISSN 0004-637X
• Publisher: Institute of Physics (IOP)
• Country of Publication: United States
• Language: English

Related Subjects

*PLANETARY NEBULAE-- COSMIC DUST
79 ASTRONOMY AND ASTROPHYSICS
ACCELERATION
INTERSTELLAR GRAINS
MASS
PRESSURE DEPENDENCE