Pierre Maxted p.maxted@keele.ac.uk
Fundamental effective temperature measurements for eclipsing binary stars – V. The circumbinary planet system EBLM J0608–59
Maxted, P F L; Miller, N J; Sebastian, D; Triaud, A H M J; Martin, D V; Duck, A
Authors
N J Miller
D Sebastian
A H M J Triaud
D V Martin
A Duck
Abstract
EBLM J0608$-$59/TOI-1338/BEBOP-1 is a 12$^{\rm th}$-magnitude, F9 V star in an eclipsing binary with a much fainter M dwarf companion on a wide, eccentric orbit (P = 14.6 d). The binary is orbited by two circumbinary planets: one transiting on a 95-d orbit and one non-transiting on a 215-d orbit. We have used high-precision photometry from the TESS mission combined with direct mass measurements for the two stars published recently to measure the following model-independent radii: $R_1 = 1.32 \pm 0.02 {\rm R}_{\odot }$, $R_2 = 0.309 \pm 0.004 {\rm R}_{\odot }$. Using $R_1$ and the parallax from Gaia EDR3, we find that this star’s angular diameter is $\theta = 0.0309 \pm 0.0005$ mas. The apparent bolometric flux of the primary star corrected for both extinction and the contribution from the M dwarf ($\lt 0.4$ per cent) is ${\mathcal {F}}_{{\oplus },0} = (0.417\pm 0.005)\times 10^{-9}$ erg cm$^{-2}$ s$^{-1}$. Hence, this F9 V star has an effective temperature $T_{\rm eff,1} = 6031{\rm \, K} \pm 46{\rm \, K\, (rnd.)} \pm 10 {\rm \, K\, (sys.)}$. EBLM J0608$-$59 is an ideal benchmark star that can be added to the sample of such systems we are establishing for ‘end-to-end’ tests of the stellar parameters measured by large-scale spectroscopic surveys.
Citation
Maxted, P. F. L., Miller, N. J., Sebastian, D., Triaud, A. H. M. J., Martin, D. V., & Duck, A. (2024). Fundamental effective temperature measurements for eclipsing binary stars – V. The circumbinary planet system EBLM J0608–59. Monthly Notices of the Royal Astronomical Society, 531(4), 4577-4583. https://doi.org/10.1093/mnras/stae1434
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 5, 2024 |
Online Publication Date | Jun 13, 2024 |
Publication Date | 2024-07 |
Deposit Date | Jul 1, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 531 |
Issue | 4 |
Pages | 4577-4583 |
DOI | https://doi.org/10.1093/mnras/stae1434 |
Keywords | techniques: spectroscopic, binaries: eclipsing, stars: fundamental parameters, stars: individual: EBLM J0608-59, stars: solar-type |
Public URL | https://keele-repository.worktribe.com/output/859623 |
Publisher URL | https://academic.oup.com/mnras/article/531/4/4577/7693153 |
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