Scientific Rationale

Planets orbiting low-mass M-dwarf stars have been among the prime targets of exoplanet research for many years. The well-known reasons include an increased transit depth, radial velocity signal, and contrast with respect to planets orbiting hotter stars. With the upcoming telescopes and observatories such as JWST and the E-ELT, the characterisation of the atmospheres of rocky planets around low-mass stars is going to become feasible, and will open new avenues of research.

The Colloquium ``OHP-2020: planets of red dwarf stars’’ will review the last years of observational and theoretical advances in the research of planets around low-mass stars, including their detection and the characterisation of their interior structure and atmospheres. We hope to identify ways to advance the key questions and solve the most pressing issues regarding the study of these systems, exploring the synergies between current and new facilities, and theoretical advances.

The colloquium will focus on:

- detection of exoplanets around low-mass stars by radial-velocity, transit, and imaging surveys
- characterisation of M-dwarf planets (e.g. atmospheres, interiors, obliquity, host multiplicity, etc.)
- interior and atmospheric modelling (including habitability around red dwarfs)
- stellar variability for the lowest-mass stars (granulation, rotation, activity cycles, etc.)
- theories of formation and evolution
- future instrumentation and observatories

The Observatoire de Haute Provence is located in Southern France, near the village of Saint Michel l’Observatoire. It is place of discovery of 51 Peg b --an achievement that earned Mayor & Queloz the Nobel prize in Physics in 2019-- and of the co-discovery of Gl876 b, the first planet detected around an M-dwarf star. The 193-cm telescope is now equipped with the SOPHIE spectrograph, which produces a steady contribution to exoplanet studies. Up to 80 participants are expected. Accommodation will be provided inside and close to the Observatory for the duration of the Colloquium. Students and post-docs are particularly encouraged to register and contribute their work. Limited financial support to cover travel and lodging expenses will be available for students/young researchers that submit abstract.



For any question, please contact:


Important Dates

1st December 2019: first announcement and pre-registration

1st February 2020: second annoucement and abstract submission

1st May 2020: abstract submission deadline

1st June 2020:
Publication of conference program.
Final registration with priority to the speakers.
Paiement of the registration fees.
Attribution of financial support



Yann Alibert
Isabelle Boisse  
Brendan Bowler
Xavier Delfosse    (co-chair)
Rodrigo Díaz (chair)
Caroline Dorn
Courtney Dressing
Teruyuki Hirano
Jeremy Leconte
Christophe Lovis
Ignasi Ribas
Bárbara Rojas Ayala
Elisabeth Newton
Ignas Snellen


Isabelle Boisse (chair)
Nathalie Bressand
Elodie Choquet
Pia Cortes
Nathalie Desmons 
Anne-Marie Galliano
Guillaume Hébrard
Sabrina Kadri
Hervé Le Coroller
Auguste Le Van Suu
Jean-Paul Payan
Florence Roman
Alexandre Santerne (co-chair)

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