Danilovich, T;
Malfait, J;
Van de Sande, M;
Montargès, M;
Kervella, P;
De Ceuster, F;
Coenegrachts, A;
... Zijlstra, A; + view all
(2024)
Chemical tracers of a highly eccentric AGB–main-sequence star binary.
Nature Astronomy
, 8
pp. 308-327.
10.1038/s41550-023-02154-y.
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Abstract
Binary interactions have been proposed to explain a variety of circumstellar structures seen around evolved stars, including asymptotic giant branch (AGB) stars and planetary nebulae. Studies resolving the circumstellar envelopes of AGB stars have revealed spirals, disks and bipolar outflows, with shaping attributed to interactions with a companion. Here we use a combined chemical and dynamical analysis to reveal a highly eccentric and long-period orbit for W Aquilae, a binary system containing an AGB star and a main-sequence companion. Our results are based on anisotropic SiN emission, the detections of irregular NS and SiC emission towards the S-type star, and density structures observed in the CO emission. These features are all interpreted as having formed during periastron interactions. Our astrochemistry-based method can yield stringent constraints on the orbital parameters of long-period binaries containing AGB stars, and will be applicable to other systems.
| Type: | Article |
|---|---|
| Title: | Chemical tracers of a highly eccentric AGB–main-sequence star binary |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41550-023-02154-y |
| Publisher version: | http://dx.doi.org/10.1038/s41550-023-02154-y |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10186652 |
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