Abstract :
V4334 Sgr (a.k.a. Sakurai's object) is the central star of an old planetary nebula that underwent a very late thermal pulse a few years before its discovery in 1996. We have been monitoring the evolution of the optical emission line spectrum since 2001. The goal is to improve the evolutionary models by constraining them with the temporal evolution of the central star temperature. In addition the high resolution spectral observations obtained by X-shooter and ALMA show the temporal evolution of the different morphological components.

Publication : Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution, Proceedings of the International Astronomical Union, IAU Symposium, Volume 323, pp. 380-381
DOI : 10.1017/S1743921317000588 
Bibcode : 2017IAUS..323..380V 
Keywords : planetary nebulae: individual (V4334 Sgr); evolution; Stars: AGB and post-AGB; circumstellar matter; Astrophysics - Solar and Stellar Astrophysics