7 papers
Two inner dust clumps in PDS 70. A third protoplanet traced by trojan material or a substructured inner disk?
O. Balsalobre-Ruza, V. Christiaens, N. Huélamo +21
The PDS 70 cavity hosts two confirmed directly imaged protoplanets and a third inner planet candidate at 13au, labeled PDS 70 d. Despite its Keplerian motion, its unusually blue sp…
Planet-Planet Secular Migration Predicts a Stellar Obliquity-Period Anti-Correlation
Hareesh Gautham Bhaskar, Cristobal Petrovich, Diego J. Muñoz
Stellar obliquities provide a fossil record of hot Jupiter (HJ) migration. An emerging observational trend in single-star systems is that strongly misaligned HJs are largely confin…
High-Eccentricity Tidal Migration Driven by Secular Chaos in Wide-Binary Systems
Yurou Liu, Hareesh Gautham Bhaskar, Xian-Yu Wang +1
High-eccentricity tidal migration driven by a distant stellar companion offers a natural pathway for producing some hot Jupiters; yet, most theoretical work has relied on an ideali…
Thermally Regulated Viscoelastic Tidal Migration of Eccentric Planets
Cristobal Petrovich, Hareesh Gautham Bhaskar
A growing population of short-period Neptune-like planets has nonzero eccentricities and, in some cases, large stellar obliquities, suggestive of high-eccentricity migration. Model…
Planetesimal-Driven Instabilities in Resonant Chains of Cold Neptunes and Their Dynamical Outcomes
Ryan LoRusso, Cristobal Petrovich, Hareesh Gautham Bhaskar
Cold Neptunes and sub-Neptunes are among the most common products of planet formation and likely dominate the angular-momentum budgets in most planetary systems, yet their dynamica…
Early Evidence for Polar Orbits of Sub-Saturns Around Hot Stars
Emma Dugan, Xian-Yu Wang, Agustin Heron +4
Sub-Saturns have been reported to preferentially occupy near-polar orbits, but this conclusion has so far been based primarily on systems with cool host stars; obliquity measuremen…