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The role of heat conduction to the formation of [WC]-type planetary nebulae

  • Christer Sandin (a1), Matthias Steffen (a1), Ralf Jacob (a1), Detlef Schönberner (a1), Ute Rühling (a1) (a2), Wolf-Rainer Hamann (a2) and Helge Todt (a2)...

Abstract

X-ray observations of young Planetary Nebulæ (PNe) have revealed diffuse emission in extended regions around both H-rich and H-deficient central stars. In order to also reproduce physical properties of H-deficient objects, we have, at first, extended our time-dependent radiation-hydrodynamic models with heat conduction for such conditions. Here we present some of the important physical concepts, which determine how and when a hot wind-blown bubble forms. In this study we have had to consider the, largely unknown, evolution of the CSPN, the slow (AGB) wind, the fast hot-CSPN wind, and the chemical composition. The main conclusion of our work is that heat conduction is needed to explain X-ray properties of wind-blown bubbles also in H-deficient objects.

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References

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Leuenhagen, U., Hamann, W.-R., & Jeffery, C. S. 1996, A&A, 312, 167
Pauldrach, A., Puls, J., Kudritzki, R. P., et al. 1988, A&A, 207, 123
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The role of heat conduction to the formation of [WC]-type planetary nebulae

  • Christer Sandin (a1), Matthias Steffen (a1), Ralf Jacob (a1), Detlef Schönberner (a1), Ute Rühling (a1) (a2), Wolf-Rainer Hamann (a2) and Helge Todt (a2)...

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