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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3981-3990
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume485
Issue number3
DOIs
Publication statusPublished - 28 Feb 2019

Bibliographical note

Funding Information:
This work was financed by FEDER – Fundo Europeu de Desen-volvimento Regional funds through the COMPETE 2020 – Op-eracional Programme for Competitiveness and Internationalisation (POCI), and by Portuguese funds through FCT – Fundac¸ão para a Ciência e a Tecnologia in the framework of the projects POCI-01-0145-FEDER-028953, PTDC/FIS-AST/7073/2014 & POCI-01-0145-FEDER-016880, and PTDC/FIS-AST/1526/2014 & POCI-01-0145-FEDER-016886. P.F., S.C.C.B., N.C.S., S.G.S, V.A. and E.D.M. acknowledge support from FCT through In-vestigador FCT contracts nr. IF/01037/2013CP1191/CT0001, IF/01312/2014/CP1215/CT0004, IF/00169/2012/CP0150/CT0002, IF/00028/2014/CP1215/CT0002, IF/00650/2015/CP1273/CT0001, and IF/00849/2015/CP1273/CT0003. S.G.S. further acknowledges support from FCT in the form of an exploratory project of reference IF/00028/2014/CP1215/CT0002. ACSF is supported by grant 234989/2014-9 from CNPq (Brazil). J.P.F. and acknowledges support from FCT through the grants SFRH/BD/93848/2013 and SFRH/BPD/87857/2012. B.R.-A. acknowledges the support from CONICYT PAI/Concurso Nacional Inserción en la Academia, Convocatoria 2015 79150050. O.D. also acknowledges support from FCT through the grants UID/FIS/04434/2013 and POCI-01-0145-FEDER-007672.

Funding Information:
This work was financed by FEDER ? Fundo Europeu de Desen-volvimento Regional funds through the COMPETE 2020 ? Op-eracional Programme for Competitiveness and Internationalisation (POCI), and by Portuguese funds through FCT ? Funda??o para a Ci?ncia e a Tecnologia in the framework of the projects POCI-01-0145-FEDER-028953, PTDC/FIS-AST/7073/2014 & POCI-01-0145-FEDER-016880, and PTDC/FIS-AST/1526/2014 & POCI-01-0145-FEDER-016886. P.F., S.C.C.B., N.C.S., S.G.S, V.A. and E.D.M. acknowledge support from FCT through In-vestigador FCT contracts nr. IF/01037/2013CP1191/CT0001, IF/01312/2014/CP1215/CT0004, IF/00169/2012/CP0150/CT0002, IF/00028/2014/CP1215/CT0002, IF/00650/2015/CP1273/CT0001, and IF/00849/2015/CP1273/CT0003. S.G.S. further acknowledges support from FCT in the form of an exploratory project of reference IF/00028/2014/CP1215/CT0002. ACSF is supported by grant 234989/2014-9 from CNPq (Brazil). J.P.F. and acknowledges support from FCT through the grants SFRH/BD/93848/2013 and SFRH/BPD/87857/2012. B.R.-A. acknowledges the support from CONICYT PAI/Concurso Nacional Inserci?n en la Academia, Convocatoria 2015 79150050. O.D. also acknowledges support from FCT through the grants UID/FIS/04434/2013 and POCI-01-0145-FEDER-007672.

Publisher Copyright:
© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.

Keywords

  • Planetary systems
  • Planets
  • Planets and satellites: dynamical evolution and stability
  • Satellites: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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