Corralling a distant unseen planet with extreme resonant Kuiper Belt Objects

Speaker: 
Renu Malhotra (Lunar and Planetary Lab, University of Arizona)
Event Date and Time: 
Mon, 2017-04-24 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Brett Gladman and Jaymie Matthews
Intended Audience: 
Graduate
Several recent studies have appealed to the clustering of the angular orbital elements of very distant, extreme Kuiper Belt Objects (eKBOs) to argue for the existence of a large planet in the distant Solar System. I will review these arguments, and also describe other properties of eKBOs that may support the existence of such an unseen planet. We observe that several eKBOs have orbital periods close to integer ratios with each other. These are not dynamically significant unless the eKBOs are in mean motion resonances (MMRs) with a massive planet. If such MMRs are true, then their resonant dynamics provide constraints on the planet's parameters and its current location in its orbital path. (For additional details, please see Malhotra et al 2016 ApJ 824 L22.)
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