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Communication Dans Un Congrès Année : 2018

OSSOS observes planet-formation structure in the main Kuiper Belt

Résumé

The Outer Solar System Origins Survey (OSSOS) has now completed its detailed search for moving objects in the transneptunian region. For the main Kuiper Belt, the survey tracked 100% of the detected objects to high-precision orbits (typical fractional semimajor axis uncertainties of 0.01 - 0.10 percent). This accuracy allows us to observe previously undiscussed structure in the classical Kuiper Belt's orbital distribution. During the early-release OSSOS data analysis, we found that the a/q/i structure (semimajor axis/perihelion/inclination) of the Kuiper Belt could still be matched adequately with that previously found by the Canada-France Ecliptic Plane Survey (CFEPS) : a hot inclination component and then a cold component split into a 'stirred' component and a concentrated 'kernel' near 44 au. With the abundant full set of OSSOS detection (extending down past 25th magnitude in r band), the data now no longer permit this simple two-component structure for the cold component. In fact, there are small-scale features of great interest in the belt, and there are new trends visible which require a more complex model. We will present these features and discuss how current models of planetary migration may explain some of them.
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Dates et versions

hal-03572513 , version 1 (14-02-2022)

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Brett Gladman, Michele T. Bannister, J. Kavelaars, Jean-Marc C. Petit, Kathryn Volk, et al.. OSSOS observes planet-formation structure in the main Kuiper Belt. American Astronomical Society, DPS meeting #50, American Astronomical Society, Oct 2018, Knoxville, United States. pp.id.302.01. ⟨hal-03572513⟩
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