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36 papers · 1 filter
The Hamiltonian for von Zeipel-Lidov-Kozai oscillations
Scott Tremaine
The Hamiltonian used in classical analyses of von Zeipel-Lidov-Kozai or ZLK oscillations in hierarchical triple systems is based on the quadrupole potential from a distant body on…
Emergence of vortices at the edges of planet-driven gaps in protoplanetary discs
Nicolas P. Cimerman, Roman R. Rafikov
Young planets embedded in protoplanetary discs (PPDs) excite spiral density waves, which propagate, shock and deposit angular momentum in the disc. This results in gap opening arou…
Radial Profiles of Surface Density in Debris Discs
Roman R. Rafikov
Resolved observations of debris discs can be used to derive radial profiles of Azimuthally-averaged Surface Density (ASD), which carries important information about the disc struct…
Density waves in protoplanetary discs excited by eccentric planets: linear theory
Callum W. Fairbairn, Roman R. Rafikov
Spiral density waves observed in protoplanetary discs have often been used to infer the presence of embedded planets. This inference relies both on simulations as well as the linea…
Dust Dynamics in Transitional Disks: Clumping and Disk Recession
Jiaqing Bi, Jeffrey Fung
The role of radiation pressure in dust migration and the opening of inner cavities in transitional disks is revisited in this paper. Dust dynamics including radiation pressure is o…
The EXPRES Stellar Signals Project II. State of the Field in Disentangling Photospheric Velocities
Lily L. Zhao, Debra A. Fischer, Eric B. Ford +40
Measured spectral shifts due to intrinsic stellar variability (e.g., pulsations, granulation) and activity (e.g., spots, plages) are the largest source of error for extreme precisi…