Contributed Talk - Splinter HotStars

Thursday, 21 September 2017, 16:11   (HS3)

The Born-again Planetary Nebulae Abell 30 and Abell 78

H. Todt1 et al.
1Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, D-14476 Potsdam, Germany

The born-again scenario was suggested in the 1980s to explain the formation of hydrogen-deficient central stars of planetary nebulae. The planetary nebulae Abell 30 and Abell 78 are such born-again nebulae, which are believed to have undergone a very late thermal pulse, resulting in the ejection of hydrogen-poor material. We present the results of kinematic analyses of the expanding nebulae of these objects together with multi-wavelength spectral analyses of the nebulae and their central stars, aiming to probe the born-again scenario. We discuss whether this evolutionary channel can also explain the formation of other hydrogen-deficient central stars.