000003996 001__ 3996
000003996 005__ 20190130134523.0
000003996 037__ $$aCTALK-2019-0063
000003996 100__ $$avan Hoof, P. A. M.
000003996 245__ $$aObservations of born-again stars
000003996 260__ $$c2018
000003996 269__ $$c2018-09-13
000003996 520__ $$aBorn-again stars are central stars of planetary nebulae (PNCS) that have undergone a (very) late thermal pulse after they have left the AGB. Evolutionary models predict that around 10-20% of PNCS should undergo a (V)LTP, yet only a handful of born-again objects are known. Only two of these were seen undergoing the flash: V605 Aql in 1918 and V4334 Sgr (a.k.a. Sakurai's object) in 1996. In my review I will give an overview of the observations of these objects, focusing mainly on V4334 Sgr as this is by far the best observed example of a born-again star. The talk will cover both observations of the central star and the circumstellar material that was ejected in the (V)LTP event.
000003996 594__ $$aNO
000003996 700__ $$aKimeswenger, S.
000003996 700__ $$aVan de Steene, G. C.
000003996 700__ $$aAvison, A.
000003996 700__ $$aZijlstra, A. A.
000003996 700__ $$aGuzman Ramirez, L.
000003996 700__ $$aHerwig, F.
000003996 700__ $$aHajduk, M.
000003996 773__ $$tHydrogen Deficient Stars 2018, Armagh, UK
000003996 8560_ $$fpeter.vanhoof@observatoire.be
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