Skip to Main content Skip to Navigation
New interface
Journal articles

Sustained FU Orionis-type outbursts from colliding discs in stellar flybys

Abstract : We perform 3D hydrodynamic simulations of disc-disc stellar flybys with on-the-fly Monte Carlo radiative transfer. We show that pre-existing circumstellar discs around both stars result in fast rising (~years) outbursts lasting two to five times longer than for a star-disc flyby. The perturber always goes into outburst ($\dot{M} 10^{-5}~{\rm M_{\odot }~ yr^{-1}}$). Whereas we find that the primary goes into a decades long outburst only when the flyby is retrograde to the circumprimary disc rotation. High accretion rates during the outburst are triggered by angular momentum cancellation in misaligned material generated by the encounter. A large fraction of accreted material is alien.
Complete list of metadata
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Friday, November 18, 2022 - 3:24:47 PM
Last modification on : Sunday, November 20, 2022 - 3:05:02 AM

Links full text




Elisabeth M. A. Borchert, Daniel J. Price, Christophe Pinte, Nicolás Cuello. Sustained FU Orionis-type outbursts from colliding discs in stellar flybys. Monthly Notices of the Royal Astronomical Society, 2022, 517, pp.4436-4446. ⟨10.1093/mnras/stac2872⟩. ⟨insu-03860252⟩



Record views