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Detecting a planet orbiting a binary system using radial velocity data


Radial velocity observations of a binary star system have led to the discovery of a gas-giant circumbinary planet, BEBOP-1 c, which is 65 times more massive than Earth, with an orbital period of 215.5 days. The binary system also hosts a smaller, inner transiting planet, TOI-1338 b, making this system a rare multi-planet circumbinary system.

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Fig. 1: Summarizing the properties of the TOI-1338 system.


  1. Number of confirmed planets. (NASA Exoplanet Archive, 2023). A NASA archive of the exoplanets that have been discovered to date.

  2. Martin, D. V. et al. The BEBOP radial-velocity survey for circumbinary planets. I. Eight years of CORALIE observations of 47 single-line eclipsing binaries and abundance constraints on the masses of circumbinary planets. Astron. Astrophys. 624, A68 (2019). This paper introduces the BEBOP survey.

    Article  Google Scholar 

  3. Kostov, V. B. et al. TOI-1338: TESS’ first transiting circumbinary planet. Astron. J. 159, 253 (2020). This paper reports the discovery of TOI-1338 b using TESS data.

    Article  ADS  Google Scholar 

  4. Michel, S. Advanced Bread and Pastry: A Professional Approach Ch. 14 (Delmar, 2009). A book that provides the specific gravity of assorted cakes.

  5. Faria, J. P. et al. kima: Exoplanet detection in radial velocities. J. Open Source Softw. 3, 487 (2018). A paper that introduces the kima package — a software package to detect and characterize exoplanets using radial velocity data.

    Article  ADS  Google Scholar 

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This is a summary of: Standing, M. R. et al. Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system. Nat. Astron. (2023).

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Detecting a planet orbiting a binary system using radial velocity data. Nat Astron 7, 653–654 (2023).

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