Ablation and Wind Mass-Loading in the Born-Again Planetary Nebula A30
M.A. Guerrero, Y.-H. Chu, W.-R. Hamann, L.M. Oskinova, D. Schönberner, H. Todt, M. Steffen, N. Ruiz, R.A. Gruendl, W.P. Blair
We present XMM-Newton and Chandra observations of the born-again
planetary nebula A30. 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.
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