Flybys in protoplanetary discs - II. Observational signatures

Nicolás Cuello, Fabien Louvet, Daniel Mentiplay, Christophe Pinte, Daniel J. Price, Andrew J. Winter, Rebecca Nealon, François Ménard, Giuseppe Lodato, Giovanni Dipierro, Valentin Christiaens, Matías Montesinos, Jorge Cuadra, Guillaume Laibe, Lucas Cieza, Ruobing Dong, Richard Alexander

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


Tidal encounters in star clusters perturb discs around young protostars. In Cuello et al., we detailed the dynamical signatures of a stellar flyby in both gas and dust. Flybys produce warped discs, spirals with evolving pitch angles, increasing accretion rates, and disc truncation. Here, we present the corresponding observational signatures of these features in optical/near-infrared scattered light and (sub) millimetre continuum and CO line emission. Using representative prograde and retrograde encounters for direct comparison, we post-process hydrodynamical simulations with radiative transfer methods to generate a catalogue of multiwavelength observations. This provides a reference to identify flybys in recent near-infrared and submillimetre observations (e.g. RW Aur, AS 205, HV Tau and DO Tau, FU Ori, V2775 Ori, and Z CMa).

Original languageEnglish
Pages (from-to)504-514
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
StatePublished - 1 Jan 2020
Externally publishedYes


  • Hydrodynamics
  • Methods: numerical
  • Planets and satellites: formation
  • Protoplanetary discs


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