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- Title
THE VERY FAST EVOLUTION OF V4334 SGR.
- Authors
van Hoof, P. A. M.; Van de Steene, G. C.; Kimeswenger, S.; Zijlstra, A. A.; Hadjuk, M.; Herwig, F.
- Abstract
V4334 Sgr (Sakurai's object) is an evolved star that underwent a very late thermal pulse ejecting a new, hydrogen-deficient nebula inside the old planetary nebula. From 2001 through 2007 the emission lines from the new nebula showed an exponential decline in flux, consistent with a shock that occurred around 1998 and started cooling soon afterwards. Since 2008 the line fluxes have been continuously rising again. Our preliminary interpretation is that this emission comes from a region close to the central star, and is excited by a second shock, which may have been induced by an increase in the stellar mass loss and wind velocity associated with a rise in the stellar temperature.
- Subjects
EMISSION spectroscopy; MASS loss (Astrophysics); VELOCITY; STELLAR density (Stellar population); SAGITTARIUS A* (Astronomy)
- Publication
EAS Publications Series, 2015, Vol 71/72, p287
- ISSN
1633-4760
- Publication type
Article
- DOI
10.1051/eas/1571064