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arXiv · 2409.13289

Sakurai's object: a [WC] star in a new bipolar nebula after a VLTP

Griet Van de Steene·Peter van Hoof·Stefan Kimeswenger·Marcin Hajduk·Daniel Tafoya·Jesus Toala·Albert Zijlstra·Daniela Barria
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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.

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Griet Van de Steene, Peter van Hoof, Stefan Kimeswenger, Marcin Hajduk, Daniel Tafoya, Jesus Toala, Albert Zijlstra, Daniela Barria. 2024-09-20. Sakurai's object: a [WC] star in a new bipolar nebula after a VLTP. https://arxiv.org/abs/2409.13289

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