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Ablation and Wind Mass-Loading in the Born-Again Planetary Nebula A 30

Published online by Cambridge University Press:  30 August 2012

Martín A. Guerrero ,
You-Hua Chu ,
Wolf-Rainer Hamann ,
Lidia Oskinova ,
Detlef Schönberner ,
Helge Todt ,
Matthias Steffen ,
Nieves Ruiz ,
Robert A. Gruendl  and
William P. Blair
Martín A. Guerrero
Affiliation:
Instituto de Astrofísica de Andalucía (IAA-CSIC), Granada, Spain email: [email protected], [email protected]
You-Hua Chu
Affiliation:
Astronomy Department, University of Illinois at Urbana-Champaign (UIUC), Urbana, USA email: [email protected], [email protected]
Wolf-Rainer Hamann
Affiliation:
Institute for Physics and Astronomy, Universität Potsdam, Potsdam, Germany email: [email protected], [email protected], [email protected]
Lidia Oskinova
Affiliation:
Institute for Physics and Astronomy, Universität Potsdam, Potsdam, Germany email: [email protected], [email protected], [email protected]
Detlef Schönberner
Affiliation:
Leibniz–Institut für Astrophysik Potsdam (AIP), Potsdam, Germany email: [email protected], [email protected]
Helge Todt
Affiliation:
Institute for Physics and Astronomy, Universität Potsdam, Potsdam, Germany email: [email protected], [email protected], [email protected]
Matthias Steffen
Affiliation:
Leibniz–Institut für Astrophysik Potsdam (AIP), Potsdam, Germany email: [email protected], [email protected]
Nieves Ruiz
Affiliation:
Instituto de Astrofísica de Andalucía (IAA-CSIC), Granada, Spain email: [email protected], [email protected]
Robert A. Gruendl
Affiliation:
Astronomy Department, University of Illinois at Urbana-Champaign (UIUC), Urbana, USA email: [email protected], [email protected]
William P. Blair
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University (PHA-JHU), Baltimore, USA email: [email protected]
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Abstract

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We present XMM-Newton and Chandra observations of the born-again planetary nebula A 30. These X-ray observations reveal a bright unresolved source at the position of the central star whose X-ray luminosity exceeds by far the model expectations for photospheric emission and for shocks within the stellar wind. We suggest that a “born-again hot bubble” may be responsible for this X-ray emission. Diffuse X-ray emission associated with the petal-like features and one of the H-poor knots seen in the optical is also found. The weakened emission of carbon lines in the spectrum of the diffuse emission can be interpreted as the dilution of stellar wind by mass-loading or as the detection of material ejected during a very late thermal pulse.

Keywords

planetary nebulae: individual (A 30)X-rays: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 378 - 379
Copyright
Copyright © International Astronomical Union 2012

References

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