SIMBAD references

2020MNRAS.492.3316G - Mon. Not. R. Astron. Soc., 492, 3316-3322 (2020/March-1)

WR 72: a born-again planetary nebula with hydrogen-poor knots.


Abstract (from CDS):

We report the discovery of a handful of optical hydrogen-poor (H-poor) knots in the central part of an extended infrared nebula centred on the [WO1] star WR 72, obtained by spectroscopic and imaging observations with the Southern African Large Telescope (SALT). Wide-field Infrared Survey Explorer (WISE) images of the nebula show that it is composed of an extended almost circular halo (of ≃6 arcmin or ≃2.4 pc in diameter) and an elongated and apparently bipolar inner shell (of a factor of six smaller size), within which the knots are concentrated. Our findings indicate that WR 72 is a new member of the rare group of H-poor planetary nebulae, which may be explained through a very late thermal pulse of a post-AGB star or by a merger of two white dwarfs.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: AGB and post-AGB - circumstellar matter - stars: individual: WR 72 - stars: winds - outflows

Simbad objects: 7

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