16 citations · 17 across the 11 of their papers we have counts for
11 papers
The Persistent Missing Mass Problem in Planet Formation
Eve J. Lee, William DeRocco, Sam Hadden +1
Recent ground-based microlensing surveys suggest that our Galaxy may abound with small free floating planets, potentially up to 21 such planets per star. We explore the impli…
Rattle-and-Break: the Impact of Planetesimal Scattering on Super-Earth Resonant Chains
Sam Hadden, Yanqin Wu
The spacings of super-Earths in multi-transiting systems exhibit a distribution that is broad and mostly featureless, with the exception of notable excesses of planet pairs situate…
Canceling Effects of Conjunctions Render Higher Order Mean Motion Resonances Weak
Elizabeth K Jones, Samuel Hadden, Supakrai Teekamongkol +1
Mean motion resonances (MMRs) are a key phenomenon in orbital dynamics. The traditional disturbing function expansion in celestial mechanics shows that, at low eccentricities, :…
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…
A Unified, Physical Framework for Mean Motion Resonances
Daniel Tamayo, Samuel Hadden
The traditional approach to analyzing mean motion resonances is through canonical perturbation theory. While this is a powerful method, its generality leads to complicated combinat…
Influence of Modeling Assumptions on the Inferred Dynamical State of Resonant Systems: A Case Study of the HD 45364 System
Ian Chow, Sam Hadden
Planetary systems exhibiting mean-motion resonances (MMRs) offer unique opportunities to study the imprint of disk-induced migration on the orbital architectures of planetary syste…
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…
Action-Angle Variables for Axisymmetric Potentials via Birkhoff Normalization
Sam Hadden
We describe a method for calculating action-angle variables in axisymmetric galactic potentials using Birkhoff normalization, a technique from Hamiltonian perturbation theory. An a…
The instability mechanism of compact multiplanet systems
Caleb Lammers, Sam Hadden, Norman Murray
To improve our understanding of orbital instabilities in compact planetary systems, we compare suites of -body simulations against numerical integrations of simplified dynamical…