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The very fast evolution of Sakurai's object

Published online by Cambridge University Press:  08 August 2017

G. C. Van de Steene ,
P. A. M. van Hoof ,
S. Kimeswenger ,
A. A. Zijlstra ,
A. Avison ,
L. Guzman-Ramirez ,
M. Hajduk  and
F. Herwig
G. C. Van de Steene
Affiliation:
Royal Observatory of Belgium, Astronomy & Astrophysics, Ringlaan 3, Brussels, Belgium email: g.vandesteene@oma.be
P. A. M. van Hoof
Affiliation:
Royal Observatory of Belgium, Astronomy & Astrophysics, Ringlaan 3, Brussels, Belgium email: g.vandesteene@oma.be
S. Kimeswenger
Affiliation:
Universidad Católica del Norte, Antofagasta, Chile
A. A. Zijlstra
Affiliation:
Jodrell Bank Centre for Astrophysics, Manchester, UK
A. Avison
Affiliation:
Jodrell Bank Centre for Astrophysics, Manchester, UK
L. Guzman-Ramirez
Affiliation:
Sterrewacht, Universiteit Leiden, The Netherlands
M. Hajduk
Affiliation:
Nicolaus Copernicus Astronomical Center, Torun, Poland
F. Herwig
Affiliation:
University of Victoria, Victoria, Canada
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Abstract

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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.

Keywords

planetary nebulae: individual (V4334 Sgr)evolutionStars: AGB and post-AGBcircumstellar matter

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