Scott Tremaine

TL;DR: In this article, the authors address the claim of Weiss et al. (2018) that the radii of adjacent planets in Kepler multi-planet systems are correlated and explore two simple toy models, in the first the radius of the planets are chosen at random from a single universal distribution, and in the second they postulate several types of system with distinct radius distributions.

TL;DR: Resonant relaxation is a two-body relaxation that arises in nearly Keplerian disks such as protoplanetary disks as mentioned in this paper, and it does not affect the semimajor axes of the particles, but enhances relaxation of particle eccentricities and inclinations.

TL;DR: In this article, the authors examined dense self-gravitating stellar systems dominated by a central potential, such as nuclear star clusters hosting a central supermassive black hole, and showed that the statistical mechanics of such systems exhibit a striking resemblance to liquid crystals, with analogous ordered-nematic and disordered-isotropic phases.

TL;DR: In this article, the authors describe the dynamics and thermodynamics of collisionless particle discs orbiting a massive central body, in the case where the disc mass is small compared to the central mass, the self-gravity of the disc dominates the non-Keplerian force, and the spread in semi-major axes is small.

TL;DR: In this paper, it was shown that even differentiated bodies can accumulate to form planets at distances that are not much larger than the Roche radius of the host star, and that the collisional fragmentation is not a barrier to rocky planet formation.