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⊙) 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 d 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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 2020
- DOI:
- 10.1093/mnrasl/slaa138
- arXiv:
- arXiv:2008.01488
- Bibcode:
- 2020MNRAS.498L.114J
- Keywords:
-
- binaries: close;
- planetary nebulae: general;
- planetary nebulae: individual: A30;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 5 pages, 3 figures, accepted for publication in MNRAS Letters