Diffuse X-rays from PNe with WR-type central stars
U. Rühling1, 2, C. Sandin2, M. Steffen2, D. Schönberner2, W.-R. Hamann1, H. Todt1,
2Astrophysikalisches Institut Potsdam, Germany
With the help of detailed nebula modeling and X-ray observations, we want to shed light on the enigmatic origin of Wolf-Rayet type central stars of planetary nebulae. This method allows us to assign observed [WC] stars to one of the proposed evolutionary scenarios, attributing the loss of hydrogen to a “late”, “very late”, or an “AGB final” thermal pulse (LTP, VLTP and AFTP, respectively). Following our analysis, we conclude that BD +30° 3639 evolved through an AFTP.