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The Orbital Eccentricity–Radius Distribution for Warm, Single Planets in TESS

  • Authors: Tyler R. Fairnington, Jiayin Dong, Chelsea X. Huang, Emma Nabbie, George Zhou, Duncan Wright, Karen A. Collins, David Ciardi, Jon M. Jenkins, David W. Latham, George Ricker, Samuel N. Quinn, Sara Seager, Avi Shporer, Roland Vanderspek, Joshua N. Winn, Khalid Barkaoui, Allyson Bieryla, Lars Buchhave, Dmitry Cheryasov, Jessie Christiansen, Courtney Dressing, Akihiko Fukui, Alexey Garmash, Steven Giacalone, Eric G. Hintz, Steve B. Howell, Keisuke Isogai, Jerome de Leon, Jorge Lillo-Box, Felipe Murgas, Norio Narita, Louise D. Nielsen, Enric Palle, Markus Rabus, Benjamin V. Rackham, Richard P. Schwarz, Gregor Srdoc, Denise C. Stephens, Gavin Wang, Noriharu Watanabe, Francis P. Wilkin, Joe Williams

Tyler R. Fairnington et al 2026 The Astrophysical Journal Letters 1008 .

  • Provider: AAS Journals

Caption: Figure 6.

Radius dependence of eccentricity for the warm sample. Gray contours show the density of the individual-planet eccentricity posterior modes from Section 3.3. Open circles with error bars show the radius-binned (“discrete”) analysis, where independent Beta distributions are fit in 1 R⊕ bins and summarized by the inferred mean eccentricity in each bin. The solid blue curve and shaded region show the posterior median and 68% credible interval of the radius-continuous hierarchical model, in which the eccentricity distribution is a two-component Beta mixture with sigmoid-weighted membership as a function of Rp.

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