Evidence for a Distant Giant Planet in the Solar S

Fora ASTRO-FORUM ASTRONOMIENS BETINGELSER Evidence for a Distant Giant Planet in the Solar S

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  • #141924

      • Super Nova

      Nu er det jo ikke første gang, at planet X er blevet postuleret. Nu sker det så igen:
      Recent analyses have shown that distant orbits within the scattered disk
      population of the Kuiper belt exhibit an unexpected clustering in their
      respective arguments of perihelion. While several hypotheses have been put
      forward to explain this alignment, to date, a theoretical model that can
      successfully account for the observations remains elusive. In this work we show
      that the orbits of distant Kuiper belt objects cluster not only in argument of
      perihelion, but also in physical space. We demonstrate that the perihelion
      positions and orbital planes of the objects are tightly confined and that such
      a clustering has only a probability of 0.007% to be due to chance, thus
      requiring a dynamical origin. We find that the observed orbital alignment can
      be maintained by a distant eccentric planet with mass greater than ~10 Earth
      masses, whose orbit lies in approximately the same plane as those of the
      distant Kuiper belt objects, but whose perihelion is 180 degrees away from the
      perihelia of the minor bodies. In addition to accounting for the observed
      orbital alignment, the existence of such a planet naturally explains the
      presence of high perihelion Sedna-like objects, as well as the known collection
      of high semimajor axis objects with inclinations between 60 and 150 degrees
      whose origin was previously unclear. Continued analysis of both distant and
      highly inclined outer solar system objects provides the opportunity for testing
      our hypothesis as well as further constraining the orbital elements and mass of
      the distant planet.


        • Nova
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