Chornay, N;
Walton, NA;
Jones, D;
Boffin, HMJ;
Rejkuba, M;
Wesson, R;
(2021)
Towards a more complete sample of binary central stars of planetary nebulae with Gaia.
Astronomy & Astrophysics
, 648
, Article A95. 10.1051/0004-6361/202140288.
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Abstract
CONTEXT: Many if not most planetary nebulae (PNe) are now thought to be the outcome of binary evolutionary scenarios. However, only a few percent of the PNe in the Milky Way are known to host binary systems. The high-precision repeated observing and long time baseline of Gaia make it well suited for detecting new close binaries through photometric variability. AIMS: We aim to find new close binary central stars of PNe (CSPNe) using data from the Gaia mission, building towards a statistically significant sample of post-common envelope, close binary CSPNe. METHODS: As the vast majority of Gaia sources do not have published epoch photometry, we used the uncertainty in the mean photometry as a proxy for determining the variability of our CSPN sample in the second Gaia data release. We derived a quantity that expresses the significance of the variability, and considered what is necessary to build a clean sample of genuine variable sources. RESULTS: Our selection recovers a large fraction of the known close binary CSPN population, while other CSPNe lying in the same region of the parameter space represent a promising set of targets for ground-based confirmatory follow-up observations. Gaia epoch photometry for four of the newly identified variable sources confirms that the variability is genuine and consistent with binarity.
| Type: | Article |
|---|---|
| Title: | Towards a more complete sample of binary central stars of planetary nebulae with Gaia |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/202140288 |
| Publisher version: | https://doi.org/10.1051/0004-6361/202140288 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | binaries: close, planetary nebulae: general, methods: statistical |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10127565 |
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