The Real-Time Evolution of V4334 Sgr
Date
2018
Authors
Van Hoof, Peter A. M.
Kimeswenger, Stefan
Van de Steene, Griet C.
Avison, Adam
Zijlstra, Albert A.
Guzman-Ramirez, Lizette
Herwig, Falk
Hadjuk, Marcin
Journal Title
Journal ISSN
Volume Title
Publisher
Galaxies
Abstract
V4334 Sgr (Sakurai’s object) is an enigmatic evolved star that underwent a very late thermal
pulse a few years before its discovery in 1996. It ejected a new hydrogen-deficient nebula in the
process. The source has been observed continuously since, at many wavelengths ranging from the
optical to the radio regime. In this paper we evaluate these data and discuss the evolution of this
object. We reach the conclusion that we have seen no evidence for photoionization of the nebula yet
and that the spectral features we see are caused either by shocks or by dust. These shocks are an
integral part of the hydrodynamic shaping that is now producing a new bipolar nebula inside the old
planetary nebula (PN), implying that we have a detailed observational record of the very early stages
of the shaping of a bipolar nebula.
Description
Keywords
stellar mass loss, stellar evolution, planetary nebulae, circumstellar dust
Citation
Van Hoof, P. A. M., Kimeswenger, S., Van de Steene, G. C., Avison, A., Zijlstra, A. A., Guzman-Ramirez, L., … Hajduk, M. (2018). The Real-Time Evolution of V4334 Sgr. Galaxies. 6(3), 1-6. https://doi.org/10.3390/galaxies6030079.