Van de Steene, G. C. ; van Hoof, P. A. M. ; Kimeswenger, S. ; Hajduk, M. ; Tafoya, D. ; Toalá, J. A. ; Zijlstra, A. ; Barría, D.

Poster presented at Planetary Nebulae: A Universal Toolbox in the Era of Precision Astrophysics. IAU Symposium, Torun (Poland) on 2023-09-04

Abstract: Optical spectra of the Very Late Thermal Pulse (VLTP) object V4334 Sgr have shown a rapidly changing spectrum resulting from shocks in the outflow, which created a new bipolar nebula inside the old nebula. We see C II and C III emission lines emerging typical of a [WC 11-10]-type star. The strong increase of [O III] and [S III] emission lines indicate the possible onset of photoionisation in the new ejecta.

Keyword(s): stars: planetary nebulae ; VLTP ; bipolar
Note: Planetary Nebulae: A Universal Toolbox in the Era of Precision Astrophysics. IAU Symposium, Vol. 384. Proceedings of the International Astronomical Union; O. De Marco, A. Zijlstra, R. Szczerba, editors., Volume 19, pp. 444-446, 3 pp.
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