CONSEQUENCES of A DISTANT MASSIVE PLANET on the LARGE SEMIMAJOR AXIS TRANS-NEPTUNIAN OBJECTS

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    We explore the distant giant planet hypothesis by integrating the large-semimajor-axis, large-pericenter trans-Neptunian objects (TNOs) in the presence of the giant planets and an external perturber whose orbit is consistent with the proposed distant, eccentric, and inclined giant planet, so-called planet 9. We find that TNOs with semimajor axes greater than 250 au experience some longitude of perihelion shepherding, but that a generic outcome of such evolutions is that the TNOs evolve to larger pericenter orbits and commonly get raised to retrograde inclinations. This pericenter and inclination evolution requires a massive disk of TNOs (tens of ${M}_{\oplus }$) in order to explain the detection of the known sample today. Some of the highly inclined orbits produced by the examined perturbers will be inside of the orbital parameter space probed by prior surveys, implying a missing signature of the ninth-planet scenario. The distant giant planet scenarios explored in this work do not reproduce the observed signal of simultaneous clustering in argument of pericenter, longitude of the ascending node, and longitude of perihelion in the region of the known TNOs.

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    Original languageEnglish
    Pages (from-to)1-9
    JournalAstronomical Journal
    Journal publication date11 Jan 2017
    Issue number63
    Volume153
    DOIs
    StatePublished - 11 Jan 2017

    ID: 140137808