4 papers
Free Floating or Merely Detached?
Sam Hadden, Yanqin Wu
Microlensing surveys suggest the presence of a surprisingly large population of free-floating planets, with a rate of about two Neptunes per star. The origin of such objects is not…
Creating Pileups of Eccentric Planet Pairs Wide of MMRs Through Divergent Migration
Jessica Lin, Ivan Dudiak, Samuel Hadden +1
Observed pileups of planets with period ratios wide of strong mean motion resonances (MMRs) pose an important puzzle. Early models showed that they can be created thr…
Eccentricities of Close Stellar Binaries
Yanqin Wu, Sam Hadden, Janosz Dewberry +2
Orbits of stellar binaries are in general eccentric. These eccentricities encode information about their early lives. Here, we use thousands of main-sequence binaries from the Gaia…
Accelerating Giant Impact Simulations with Machine Learning
Caleb Lammers, Miles Cranmer, Sam Hadden +3
Constraining planet formation models based on the observed exoplanet population requires generating large samples of synthetic planetary systems, which can be computationally prohi…