K2-138 Systemet

› Fora › ASTRO-FORUM › NYT FRA VIDENSKABEN › K2-138 Systemet

Tagget: 

  • Dette emne har 2 svar og 1 stemme, og blev senest opdateret for 6 år, 1 måned siden af Bjarne. This post has been viewed 706 times
Viser 3 indlæg - 1 til 3 (af 3 i alt)
  • Forfatter
    Indlæg
  • 12. januar 2018 kl. 17:20 #315697

    Bjarne
    Moderator
      • Super Nova

      The K2-138 System: A Near-Resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists

      K2-138 is a moderately bright (V = 12.2, K = 10.3) main sequence K-star observed in Campaign 12 of the NASA K2 mission. It hosts five small (1.6-3.3R_Earth) transiting planets in a compact architecture. The periods of the five planets are 2.35 d, 3.56 d, 5.40 d, 8.26 d, and 12.76 d, forming an unbroken chain of near 3:2 resonances. Although we do not detect the predicted 2-5 minute transit timing variations with the K2 timing precision, they may be observable by higher cadence observations with, for example, Spitzer or CHEOPS. The planets are amenable to mass measurement by precision radial velocity measurements, and therefore K2-138 could represent a new benchmark systems for comparing radial velocity and TTV masses. K2-138 is the first exoplanet discovery by citizen scientists participating in the Exoplanet Explorers project on the Zooniverse platform.

       

      13. januar 2018 kl. 17:36 #315710

      Bjarne
      Moderator
        • Super Nova

        Kepler K2-138 System (Artist’s Concept)

         

        13. januar 2018 kl. 17:38 #315711

        Bjarne
        Moderator
          • Super Nova

          Citizen Scientists Discover Five-Planet System

           

        • Forfatter
          Indlæg
        Viser 3 indlæg - 1 til 3 (af 3 i alt)
        • Emnet 'K2-138 Systemet' er lukket for nye svar.