Rodriguez-Gil, P;
Santander-Garcia, M;
Knigge, C;
Corradi, RLM;
Gaensicke, BT;
Barlow, MJ;
Drake, JJ;
... Rubio-Diez, MM; + view all
(2010)
The orbital period of V458 Vulpeculae, a post-double common-envelope nova.
Monthly Notices of the Royal Astronomical Society
, 407
(1)
L21-L25.
10.1111/j.1745-3933.2010.00895.x.
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Abstract
We present time-resolved optical spectroscopy of V458 Vulpeculae (Nova Vul 2007 No. 1) spread over a period of 15 months starting 301 d after its discovery. Our data reveal radial-velocity variations in the He IIλ5412 and He IIλ4686 emission lines. A period analysis of the radial-velocity curves resulted in a period of 98.096 47 ± 0.000 25 min (0.068 122 55 ± 0.000 000 17 d) which we identify with the orbital period of the binary system. V458 Vul is therefore the planetary nebula central binary star with the shortest period known. We explore the possibility of the system being composed of a relatively massive white dwarf (M1 ≳ 1.0 M⊙) accreting matter from a post-asymptotic giant branch star which produced the planetary nebula observed. In this scenario, the central binary system therefore underwent two common-envelope episodes. A combination of previous photoionization modelling of the nebular spectra, post-asymptotic giant branch evolutionary tracks and the orbital period favour a mass of M2 ∼ 0.6 M⊙ for the donor star. Therefore, the total mass of the system may exceed the Chandrasekhar mass, which makes V458 Vul a Type Ia supernova progenitor candidate.
| Type: | Article |
|---|---|
| Title: | The orbital period of V458 Vulpeculae, a post-double common-envelope nova |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/j.1745-3933.2010.00895.x |
| Publisher version: | https://doi.org/10.1111/j.1745-3933.2010.00895.x |
| 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: | accretion, accretion discs, binaries: close, stars: individual: V458 Vul, novae, cataclysmic variables |
| 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-pp.ucl.ac.uk/id/eprint/10095317 |
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