New and Exciting
- Young supersolar open clusters might have been born in the inner galaxy
and moved outward. What type of spiral structure is needed to account for this?
Migration in the shearing sheet and estimates for young open cluster migration
- Originally developed for graphics applications, we modified mass spring models
to numerically explore a new field: Astro-Elastodynamics .
For a talk (2017) on cracking moons and tidal evolution and spin dynamics
(with mass-spring models) see
Astro-Elastodynamics (soft astronomy!)
- Explaining the weird high obliquities (spin tilts)
of Pluto and Charon's minor satellites, Styx, Nix, Kerberos and Hydra.
Obliquity evolution of the minor satellites of Pluto and Charon
- A new spin resonance model for the spin-secular/mean-motion resonance:
Tilting Styx and Nix but not Uranus with a Spin-Precession-Mean-motion resonance
- Some Robotic Physics:
The thing that makes your cell phone buzz is a vibrational motor
and they cost about a dollar.
The vibration causes streaming in a fluid and if you break the rotational
symmetry the motor can swim! This paper illustrates a novel and low cost
robotic swimmer that has no external moving parts.
A coin vibrational motor swimming at low Reynolds number,
published in Regular and Chaotic Dynamics, 2016, Vol. 21, No. 7-8, pp 902-917.
Talk on the Swimming Vibrational Motor
Click on the figure to see the movie!
Showing the glycerin velocity field in the frame of the swimming motor.
- Tidal spin down and drift rates for triaxial ellipsoids like Haumea,
Tidal spin down rates of homogenous triaxial viscoelastic bodies (with Andrea!)
- Dippers discovered in the Kepler's K2 mission light curves
by citizen scientists are explained with
accretion streams and disk material below dust sublimation temperature at
the edge of a magnetospherically truncated accretion disk: (accepted in MNRAS!)
Dippers and Dusty Disks Edges: A Unified Model (arxiv) part of Eva's thesis,
(ADS) Dippers and dusty disc edges: new diagnostics and comparison to model predictions