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Showing 1–7 of 7 results
Advanced filters: Author: James J. McCormac Clear advanced filters

  • Observations of TOI-849b reveal a radius smaller than Neptune’s but a large mass of about 40 Earth masses, indicating that the planet is the remnant core of a gas giant.

    • David J. Armstrong
    • Théo A. Lopez
    • Zhuchang Zhan
    Research
    Nature
    Volume: 583, P: 39-42

  • LTT 9779 b is Neptune-sized planet rotating around its star with a period of 0.79 days and an equilibrium temperature of 2,000 K. It is not clear how it retained its atmospheric envelope, which contains ~10% of H/He, as it should have been photoevaporated by now.

    • James S. Jenkins
    • Matías R. Díaz
    • Andrew W. Mann
    Research
    Nature Astronomy
    Volume: 4, P: 1148-1157

  • 2M1510 is an approximately 45-million-year-old triple system of brown dwarfs, two of which form a close binary in a 20-day orbit and have almost the same mass (3.82% and 3.75% of the mass of the Sun, respectively). Their physical parameters are in good agreement with evolutionary models except for luminosity, suggesting that we might be underestimating the masses of brown dwarfs and massive exoplanets by about 30%.

    • Amaury H. M. J. Triaud
    • Adam J. Burgasser
    • Michaël Gillon
    Research
    Nature Astronomy
    Volume: 4, P: 650-657