Abell 30 -- A Binary Central Star Among the Born-Again Planetary Nebulae

Abstract

Eight planetary nebulae have been identified as `born-again', a class of object typified by knotty secondary ejecta having low masses ($\sim$$10^{-4}$ M${}_{\odot }$) with nearly no hydrogen. Abell 30, the archetype of the class, also belongs to a small subset of planetary nebulae that exhibit extreme abundance discrepancy factors (where Abell 30 is the most extreme), a phenomenon strongly linked to binary star interactions. We report the presence of light curve brightness variations having a period of 1.060 days that are highly suggestive of a binary central star in Abell 30. If confirmed, this detection supports the proposed link between binary central stars and extreme abundance discrepancies.

5 pages, 3 figures, accepted for publication in MNRAS Letters

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Cited by in corpus (4)

• Carbon dust in the evolved born-again planetary nebulae A30 and A78
• First images of the molecular gas around a born-again star revealed by ALMA
• Abundance Analysis of the J4 Equatorial Knot of the Born-again Planetary Nebula A30
• Twenty years of observations of PM 1-188: Its chemical abundances and extraordinary kinematics