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AGB Mass-Loss History & Haloes Around Planetary Nebulae

Published online by Cambridge University Press:  26 May 2016

Romano L.M. Corradi ,
Matthias Steffen ,
Detlef Schönberner  and
Mario Perinotto
Romano L.M. Corradi
Affiliation:
Isaac Newton Group of Telescopes, La Palma, Canary Islands, Spain
Matthias Steffen
Affiliation:
Astrophysikalisches Institut Potsdam, Potsdam, Germany
Detlef Schönberner
Affiliation:
Astrophysikalisches Institut Potsdam, Potsdam, Germany
Mario Perinotto
Affiliation:
Dipartimento di Astronomia e Scienza dello Spazio, Firenze, Italy

Extract

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Ionized haloes around planetary nebulae (PNe) are a quite common phenomenon, being found in about 70% of the elliptical PNe for which adequately deep images exist (cf. Corradi, these proceedings). Physically, one has to distinguish between two different kind of haloes. AGB haloes consist of photo-ionized matter still containing information about the mass loss history during the last thermal pulse cycle on the Asymptotic Giant Branch. A second kind of halo may develop when recombination sets in as a consequence of the fast luminosity drop during the advanced post-AGB evolution. These recombination haloes, which can be confused with real AGB haloes on a pure morphological basis, are not a signature of an AGB mass-loss episode (Corradi et al. 2000).

Type
Part VII: Nebular Morphology and Dynamics
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 455 - 456
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Corradi, R., Schönberner, D., Steffen, M., Perinotto, M., 2000, A&A 354, 1071 Google Scholar
Perinotto, M., 1991, ApJS 76, 687 Google Scholar
Plait, P., Soker, N., 1990, AJ 99, 1883 Google Scholar