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On the rise times in FU Orionis events

Abstract : We examine whether stellar flyby simulations can initiate FU Orionis outbursts using 3D hydrodynamics simulations coupled to live Monte Carlo radiative transfer. We find that a flyby where the secondary penetrates the circumprimary disc triggers a 1-2 yr rise in the mass accretion rate to 10-4 M yr-1 that remains high (≳10-5 M yr-1) for more than a hundred years, similar to the outburst observed in FU Ori. Importantly, we find that the less massive star becomes the dominant accretor, as observed.
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Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Monday, June 27, 2022 - 9:04:47 AM
Last modification on : Tuesday, August 2, 2022 - 3:10:48 AM

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Elisabeth M. A. Borchert, Daniel J. Price, Christophe Pinte, Nicolás Cuello. On the rise times in FU Orionis events. Monthly Notices of the Royal Astronomical Society: Letters, 2022, 510, pp.L37-L41. ⟨10.1093/mnrasl/slab123⟩. ⟨insu-03705376⟩



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