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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2019

The metallicity-period-mass diagram of low-mass exoplanets

Sérgio G. Sousa
  • Function : Author
Vardan Adibekyan
Nuno C. Santos
  • Function : Author
Annelies Mortier
  • Function : Author
Susana C. C. Barros
  • Function : Author
Elisa Delgado-Mena
  • Function : Author
Olivier Demangeon
Garik Israelian
  • Function : Author
João P. Faria
  • Function : Author
Pedro Figueira
Barbara Rojas-Ayala
  • Function : Author
Maria Tsantaki
  • Function : Author
Daniel T. Andreasen
  • Function : Author
Isa Brandão
  • Function : Author
Andressa C. S. Ferreira
  • Function : Author
Marco Montalto
  • Function : Author


The number of exoplanet detections continues to grow following the development of better instruments and missions. Key steps for the understanding of these worlds comes from their characterization and statistical studies. We explore the metallicity-period-mass diagram for known exoplanets by using an updated version of The Stellar parameters for stars with ExoplanETs CATalogue (SWEET-Cat), a unique compilation of precise stellar parameters for planet-host stars provided for the exoplanet community. Here, we focus on the planets with minimum mass below 30 M which seems to present a possible correlation in the metallicity-period-mass diagram where the mass of the planet increases with both metallicity and period. Our analysis suggests that the general observed correlation may not be fully explained by observational biases. Additional precise data will be fundamental to confirm or deny this possible correlation.
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insu-03666749 , version 1 (16-06-2023)



Sérgio G. Sousa, Vardan Adibekyan, Nuno C. Santos, Annelies Mortier, Susana C. C. Barros, et al.. The metallicity-period-mass diagram of low-mass exoplanets. Monthly Notices of the Royal Astronomical Society, 2019, 485, pp.3981-3990. ⟨10.1093/mnras/stz664⟩. ⟨insu-03666749⟩
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