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6 papers · 2 filters
The Mass and Size Distribution of Planetesimals Formed by the Streaming Instability. II. The Effect of the Radial Gas Pressure Gradient
Charles P. Abod, Jacob B. Simon, Rixin Li +3
The streaming instability concentrates solid particles in protoplanetary disks, leading to gravitational collapse into planetesimals. Despite its key role in producing particle clu…
On the Dynamics of the Inclination Instability
Ann-Marie Madigan, Alexander Zderic, Michael McCourt +1
Axisymmetric disks of eccentric Kepler orbits are vulnerable to an instability which causes orbits to exponentially grow in inclination, decrease in eccentricity, and cluster in th…
A brief overview of planet formation
Philip J. Armitage
The initial conditions, physics, and outcome of planet formation are now constrained by detailed observations of protoplanetary disks, laboratory experiments, and the discovery of…
Turbulence in the TW Hya Disk
Kevin M. Flaherty, A. Meredith Hughes, Richard Teague +3
Turbulence is a fundamental parameter in models of grain growth during the early stages of planet formation. As such, observational constraints on its magnitude are crucial. Here w…
Interstellar object 'Oumuamua as an extinct fragment of an ejected cometary planetesimal
Sean N. Raymond, Philip J. Armitage, Dimitri Veras
'Oumuamua was discovered passing through our Solar System on a hyperbolic orbit. It presents an apparent contradiction, with colors similar to those of volatile-rich Solar System b…
On the Numerical Robustness of the Streaming Instability: Particle Concentration and Gas Dynamics in Protoplanetary Disks
Rixin Li, Andrew N. Youdin, Jacob B. Simon
The Streaming Instability (SI) is a mechanism to concentrate solids in protoplanetary disks. Nonlinear particle clumping from the SI can trigger gravitational collapse into planete…