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The rapid evolution of the central star of the Stingray Nebula — latest news from the HST

Authors: Reindl, Nicole; Rauch, Thomas; Miller Bertolami, Marcelo Miguel; Werner, Klaus;

The rapid evolution of the central star of the Stingray Nebula — latest news from the HST

Abstract

SAO 244567 is an unusually fast evolving star. Within twenty years only, it had turned from a B-type supergiant into the central star of the Stingray Nebula. Space- and ground-based observations obtained over the last decades have revealed that its spectrum changes noticeably over just a few years, showing stellar evolution in real time. The low mass of SAO 244567 is, however, in strong contradiction with canonical post-asymptotic giant branch evolution. Thus, its fast evolution has been a mystery for decades. We present preliminary results of the non-LTE spectral analyis of the recently obtained HST/COS observations, which finally allow us to shed light on the evolutionary history of this extraordinary object.

Facultad de Ciencias Astronómicas y Geofísicas

Instituto de Astrofísica de La Plata

Country
Argentina
Subjects by Vocabulary

Microsoft Academic Graph classification: Physics Nebula Astronomy Astrophysics Star (graph theory) Stingray Supergiant Low Mass Stellar evolution

Keywords

Ciencias Astronómicas, History, Central star, Computer Science Applications, Education, Stingray Nebula

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citations
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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impulse
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