Exoplanets & Exomoons

BEBOP V. Homogeneous Stellar Analysis of Potential Circumbinary Planet Hosts

By Keith Cowing
Status Report
June 6, 2024
Filed under , , , , , , , ,
BEBOP V. Homogeneous Stellar Analysis of Potential Circumbinary Planet Hosts
Colour-Magnitude diagram of the BEBOP sample, using Gaia DR3, with the colour representing our effective temperature. The cooler stars are represented by darker colours, becoming brighter as the effective temperature increases. The expected trend of the brightest, bluest stars (top left) being the hottest, and the dimmer, redder ones (bottom right) being the coolest is seen clearly here. — astro-ph.SR

Planets orbiting binary systems are relatively unexplored compared to those around single stars. Detections of circumbinary planets and planetary systems offer a first detailed view into our understanding of circumbinary planet formation and dynamical evolution.

The BEBOP (Binaries Escorted by Orbiting Planets) radial velocity survey plays a special role in this adventure as it focuses on eclipsing single-lined binaries with an FGK dwarf primary and M dwarf secondary allowing for the highest-radial velocity precision using the HARPS and SOPHIE spectrographs.

We obtained 4,512 high-resolution spectra for the 179 targets in the BEBOP survey which we used to derive the stellar atmospheric parameters using both equivalent widths and spectral synthesis. We furthermore derive stellar masses, radii, and ages for all targets.

With this work, we present the first homogeneous catalogue of precise stellar parameters for these eclipsing single-lined binaries.

Alix V. Freckelton, Daniel Sebastian, Annelies Mortier, Amaury H.M.J. Triaud, Pierre F.L. Maxted, Lorena Acuña, David J. Armstrong, Matthew P. Battley, Thomas A. Baycroft, Isabelle Boisse, Vincent Bourrier, Andres Carmona, Gavin A.L. Coleman, Andrew Collier Cameron, Pía Cortés-Zuleta, Xavier Delfosse, Georgina Dransfield, Alison Duck, Thierry Forveille, Jenni R. French, Nathan Hara, Neda Heidari, Coel Hellier, Vedad Kunovac, David V. Martin, Eder Martioli, James J. McCormac, Richard P. Nelson, Lalitha Sairam, Sérgio G. Sousa, Matthew R. Standing, Emma Willett

Subjects: Solar and Stellar Astrophysics (astro-ph.SR); Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2406.03094 [astro-ph.SR] (or arXiv:2406.03094v1 [astro-ph.SR] for this version)
Focus to learn more
Submission history
From: Alix Violet Freckelton
[v1] Wed, 5 Jun 2024 09:34:43 UTC (3,415 KB)

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻