7 citations · 18 across the 9 of their papers we have counts for
10 papers
Discovery of an Inflated Hot Neptune and Its Formation from Jovian Mass Loss
Grant C. Weldon, Samuel W. Yee, Bradley M. S. Hansen +17
The production of Neptune-like planets with orbital periods of 3--6 days is challenging for conventional models of high-eccentricity migration. We present the discovery and charact…
Saving Doomed Planets: Mass Loss and Angular Momentum Return Boost Hot Jupiter Survival Rates
Grant C. Weldon, Bradley M. S. Hansen, Smadar Naoz
The existence of giant extrasolar planets on short-period orbits ("hot Jupiters") challenges planet formation theories because such planets are difficult to form close to the star.…
Dynamical Excitation as a probe of planetary origins
Brad M. S. Hansen, Tze-Yeung Yu, Neel Nagarajan +1
We present a set of numerical simulations of the dynamical evolution of compact planetary systems migrating in a protoplanetary disk whose inner edge is sculpted by the interaction…
The cold Jupiter eccentricity distribution is consistent with EKL driven by stellar companions
Grant C. Weldon, Smadar Naoz, Bradley M. S. Hansen
The large eccentricities of cold Jupiters and the existence of hot Jupiters have long challenged theories of planet formation. A proposed solution to both of these puzzles is high-…
Once a Triple, Not Always a Triple: The Evolution of Hierarchical Triples that Yield Merged Inner Binaries
Cheyanne Shariat, Smadar Naoz, Kareem El-Badry +4
More than half of all main-sequence (MS) stars have one or more companions, and many of those with initial masses <8 M are born in hierarchical triples. These systems featu…
Analytical models for secular descents in hierarchical triple systems
Grant C. Weldon, Smadar Naoz, Bradley M. S. Hansen
Triple body systems are prevalent in nature, from planetary to stellar to supermassive black hole scales. In a hierarchical triple system, oscillations of the inner orbit's eccentr…
Widespread disruption of resonant chains during protoplanetary disk dispersal
Brad M. S. Hansen, Tze-Yeung Yu, Yasuhiro Hasegawa
We describe the evolution of low mass planets in a dispersing protoplanetary disk around a Solar mass star. The disk model is based on the results of Yu, Hansen & Hasegawa (2023),…
Predicting the Dominant Formation Mechanism of Multi-Planetary Systems
Cheyanne Shariat, Yasuhiro Hasegawa, Bradley M. S. Hansen +2
Most, if not all, sun-like stars host one or more planets, making multi-planetary systems commonplace in our galaxy. We utilize hundreds of multi-planet simulations to explore the…
A Reply to: Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b
David Kipping, Alex Teachey, Daniel A. Yahalomi +7
Recently, Heller & Hippke argued that the exomoon candidates Kepler-1625 b-i and Kepler-1708 b-i were allegedly 'refuted'. In this Matters Arising, we address these claims. For Kep…
Bound circumplanetary orbits under the influence of radiation pressure: Application to dust in directly imaged exoplanet systems
Brad M. S. Hansen, Kevin Hayakawa
We examine the population of simply periodic orbits in the Hill problem with radiation pressure included, in order to understand the distribution of gravitationally bound dust in o…