• Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40

    Context. Despite being a prominent subset of the exoplanet population discovered in the past three decades, the nature and provenance of sub-Neptune-sized planets is still one of the open questions in exoplanet science. Aims: For planets orbiting bright stars, precisely measuring the orbital and planet parameters of the system is the best approach

    Luque, R. et al.

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