5 papers
Turbulence and dust fragility in protoplanetary discs
Simin Tong, Richard Alexander, Giovanni Rosotti
Dust growth from micron- to planet-size in protoplanetary discs involves multiple physical processes, including dust collisions, the streaming instability, and pebble accretion. Di…
Leading & Trailing Spiral Arms in a Nearly Broken Protoplanetary Disc
Sahl Rowther, Rebecca Nealon, Richard Alexander +1
We perform three-dimensional smoothed particle hydrodynamics simulations to investigate the formation of spiral arms in misaligned circumbinary discs. In a nearly broken disc the m…
Disc-planet misalignment from an unstable triple system: IRAS04125
Rebecca Nealon, Jeremy L. Smallwood, Hossam Aly +5
The IRAS01425+2902 wide binary system was recently reported to have both a young planet and a puzzling geometric arrangement, where the planet and binary both orbit edge-on, but mi…
Evidence of a Disk-wind Origin for Fluorescent H in Classical T Tauri Stars
Matt Kalscheur, Kevin France, Brunella Nisini +8
We use FUV spectra of 36 T Tauri stars, predominately from 's ULLYSES program, to examine the kinematic properties of fluorescent H emission li…
Compact protoplanetary discs can be produced by dead zones
Simin Tong, Richard Alexander
Radially compact protoplanetary discs (<=50 au) are ubiquitous in nearby star-forming regions. Multiple mechanisms have been invoked to interpret various compact discs. In this pap…