Abstract
view Abstract Citations (64) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Interaction of planetary nebulae with the interstellar medium: theory. Soker, Noam ; Borkowski, Kazimierz J. ; Sarazin, Craig L. Abstract We performed hydrodynamical simulations of the interaction between planetary nebulae (PNs) and the interstellar medium (ISM), in order to provide a theoretical framework for observations of interacting PNs. Our results validate a thin-shell approximation originally developed by Smith [MNRAS, 175, 419 (1976)] to calculate the expected displacement of central stars from PN centers, for a typical nebula in which the shocked ISM gas cools down to a characteristic nebular temperature of ∼104 K. This simple picture breaks down for high-velocity PNs in a low density environment, where the shocked ISM cools slowly. In this case, a Rayleigh-Taylor instability develops, leading to shell fragmentation on roughly the same timescale on which the shell is decelerated. We use our results to interpret observations of two interacting nebulae of particular interest, NGC 246 and the PN in the globular cluster M22. Publication: The Astronomical Journal Pub Date: October 1991 DOI: 10.1086/115963 Bibcode: 1991AJ....102.1381S Keywords: Globular Clusters; Interstellar Matter; Planetary Nebulae; Stellar Physics; Astronomical Models; Hydrodynamics; Astrophysics full text sources ADS | data products SIMBAD (5)
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