EDP Sciences
Free access
Issue A&A
Volume 405, Number 3, July III 2003
Page(s) 1075 - 1086
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20030696



A&A 405, 1075-1086 (2003)
DOI: 10.1051/0004-6361:20030696

The post-AGB evolution of AGB mass loss variations

R. Meijerink1, G. Mellema1 and Y. Simis1, 2

1  Sterrewacht Leiden, PO Box 9513, 2300 RA, Leiden, The Netherlands
    e-mail: mellema@strw.leidenuniv.nl;simis@strw.leidenuniv.nl
2  Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

(Received 11 December 2002 / Accepted 28 April 2003 )

Abstract
We present new numerical hydrodynamical modelling of the evolution of Asymptotic Giant Branch (AGB) mass loss fluctuations during the post-AGB/Planetary Nebula phase. These models show that after ionization, the observable effects of the mass loss fluctuations disappear in a few thousand years, consistent with the fact that only few PNe have been found to be surrounded by "rings". We derive the observational characteristics of these rings, and compare them to reported observations of the rings around NGC 6543, finding a good match of emission properties and line shapes. We predict small variations in the observable electron temperatures.


Key words: planetary nebulae: general -- ISM: bubbles -- stars: AGB and post-AGB -- hydrodynamics

Offprint request: R. Meijerink, meijerin@strw.leidenuniv.nl

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Editor-in-Chief: T. Forveille
Letters Editor-in-Chief: J. Alves
Managing Editor: C. Bertout

ISSN: 0004-6361 ; e-ISSN: 1432-0746
Frequency: 12 volumes per year
Published by: EDP Sciences

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