OSSOS: XIII. Fossilized Resonant Dropouts Tentatively Confirm Neptune's Migration was Grainy and Slow

Abstract

The migration of Neptune's resonances through the proto-Kuiper belt has been imprinted in the distribution of small bodies in the outer Solar System. Here we analyze five published Neptune migration models in detail, focusing on the high pericenter distance (high-q) trans-Neptunian Objects (TNOs) near Neptune's 5:2 and 3:1 mean-motion resonances, because they have large resonant populations, are outside the main classical belt, and are relatively isolated from other strong resonances. We compare the observationally biased output from these dynamical models with the detected TNOs from the Outer Solar System Origins Survey, via its Survey Simulator. All of the four new OSSOS detections of high-q non-resonant TNOs are on the Sunward side of the 5:2 and 3:1 resonances. We show that even after accounting for observation biases, this asymmetric distribution cannot be drawn from a uniform distribution of TNOs at 2sigma confidence. As shown by previous work, our analysis here tentatively confirms that the dynamical model that uses grainy slow Neptune migration provides the best match to the real high-q TNO orbital data. However, due to extreme observational biases, we have very few high-q TNO discoveries with which to statistically constrain the models. Thus, this analysis provides a framework for future comparison between the output from detailed, dynamically classified Neptune migration simulations and the TNO discoveries from future well-characterized surveys. We show that a deeper survey (to a limiting r-magnitude of 26.0) with a similar survey area to OSSOS could statistically distinguish between these five Neptune migration models.

Accepted for publication in the Astronomical Journal

References in corpus (15)

• Origin of the Structure of the Kuiper Belt during a Dynamical Instability in the Orbits of Uranus and Neptune
• OSSOS. VII. 800+ trans-Neptunian objects - the complete data release
• OSSOS VI. Striking Biases in the detection of large semimajor axis Trans-Neptunian Objects
• Tracking Neptune's Migration History through High-Perihelion Resonant Trans-Neptunian Objects
• A Possible Divot in the Size Distribution of the Kuiper Belt's Scattering Objects
• OSSOS. VIII. The Transition Between Two Size Distribution Slopes in the Scattering Disk
• The orbital distribution of trans-Neptunian objects beyond 50 au
• Consequences of a Distant Massive Planet on the Large Semi-major Axis Trans-Neptunian Objects
• Trans-Neptunian Objects Transiently Stuck in Neptune's Mean Motion Resonances: Numerical simulations of the current population
• The 5:1 Neptune Resonance as Probed by CFEPS: Dynamics and Population
• OSSOS IX: two objects in Neptune's 9:1 resonance -- implications for resonance sticking in the scattering population
• Neptune's 5:2 Resonance in the Kuiper Belt
• The Structure of the Distant Kuiper Belt in a Nice Model Scenario
• A dwarf planet class object in the 21:5 resonance with Neptune
• Limits on the number of primordial Scattered Disk objects at Pluto mass and higher from the absence of their dynamical signatures on the present day trans-Neptunian Populations

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