@article{e0a5c704cc8241cd85e5bfbf097375d4,
title = "Flybys in protoplanetary discs: I. Gas and dust dynamics",
abstract = "We present 3D smoothed particle hydrodynamics simulations of protoplanetary discs undergoing a flyby by a stellar perturber on a parabolic orbit lying in a plane inclined relative to the disc mid-plane. We model the disc as a mixture of gas and dust, with grains ranging from 1 μm to 10 cm in size. Exploring different orbital inclinations, periastron distances, and mass ratios, we investigate the disc dynamical response during and after the flyby. We find that flybys induce evolving spiral structure in both gas and dust that can persist for thousands of years after periastron. Gas and dust structures induced by the flyby differ because of drag-induced effects on the dust grains. Variations in the accretion rate by up to an order of magnitude occur over a time-scale of the order of 10 yr or less, inducing FU Orionis-like outbursts. The remnant discs are truncated and warped. The dust disc is left more compact than the gas disc, both because of disc truncation and accelerated radial drift of grains induced by the flyby.",
keywords = "Hydrodynamics, Methods: numerical, Planets and satellites: formation, Protoplanetary discs",
author = "Nicol{\'a}s Cuello and Giovanni Dipierro and Daniel Mentiplay and Price, {Daniel J.} and Christophe Pinte and Jorge Cuadra and Guillaume Laibe and Fran{\c c}ois M{\'e}nard and Poblete, {Pedro P.} and Mat{\'i}as Montesinos",
note = "Funding Information: NC acknowledges financial support provided by FONDECYT grant 3170680. GD acknowledges financial support from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement No 681601). DJP and CP acknowledge funding from the Australian Research Council via FT170100040, FT130100034, and DP180104235. JC acknowledges support from CONICYT-Chile through FONDECYT (1141175) and Basal (PFB0609) grants. JC, PPP, and MM acknowledge financial support from ICM (Iniciativa Cient{\'i}fica Milenio, Chilean Ministry of Economy) via grant RC130007, the N{\'u}cleo Milenio de Formaci{\'o}n Planetaria grant. MM acknowledge financial support from the CHINA-CONICYT fund, 4th call. FM{\'e}, GL, and CP acknowledge funding from ANR of France under contract number ANR-16-CE31-0013. DJP and DM thank Pontificia Universidad Cat{\'o}lica de Chile and the Millenium Discs Nucleus for hospitality and funding during a visit to Santiago where this project was initiated. This project was partially supported by the IDEXLyon project (contract n◦ANR-16-IDEX-0005) under University of Lyon auspices. Figs 2–9, B1, D1 and D2 were made with SPLASH (Price 2007). The Geryon2 cluster housed at the Centro de Astro-Ingenier{\'i}a UC was used for the calculations performed in this paper. The BASAL PFB-06 CATA, Anillo ACT-86, FONDEQUIP AIC-57, and QUIMAL 130008 provided funding for several improvements to the Geryon/Geryon2 cluster. This research used the ALICE High Performance Computing Facility and the DiRAC Data Intensive service operated by the University of Leicester IT Services. These resources form part of the STFC DiRAC HPC Facility (www.dirac.ac.uk), jointly funded by STFC and the Large Facilities Capital Fund of BIS via STFC capital grants ST/K000373/1 and ST/R002363/1 and STFC DiRAC Operations grant ST/R001014/1. DiRAC is part of the National e-Infrastructure. We thank Mohamed Hibat Allah for helping with the flyby setup at an early stage of this work. This work made extensive use of the NASA ADS data base. Funding Information: NC acknowledges financial support provided by FONDECYT grant 3170680. GD acknowledges financial support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 681601). DJP and CP acknowledge funding from the Australian Research Council via FT170100040, FT130100034, and DP180104235. JC acknowledges support from CONICYT-Chile through FONDECYT (1141175) and Basal (PFB0609) grants. JC, PPP, and MM acknowledge financial support from ICM (Iniciativa Cient{\'i}fica Milenio, Chilean Ministry of Economy) via grant RC130007, the N{\'u}cleo Milenio de Formaci{\'o}n Planetaria grant. MM acknowledge financial support from the CHINA-CONICYT fund, 4th call. FM{\'e}, GL, and CP acknowledge funding from ANR of France under contract number ANR-16-CE31-0013. DJP and DM thank Pontificia Universidad Cat{\'o}lica de Chile and the Millenium Discs Nucleus for hospitality and funding during a visit to Santiago where this project was initiated. This project was partially supported by the IDEXLyon project (contract n. ANR-16-IDEX-0005) under University of Lyon auspices. Figs 2.9, B1, D1 and D2 were made with SPLASH (Price 2007). The Geryon2 cluster housed at the Centro de Astro-Ingenier{\'i}a UC was used for the calculations performed in this paper. The BASAL PFB-06 CATA, Anillo ACT-86, FONDEQUIP AIC-57, and QUIMAL 130008 provided funding for several improvements to the Geryon/Geryon2 cluster. This research used the ALICE High Performance Computing Facility and the DiRAC Data Intensive service operated by the University of Leicester IT Services. These resources form part of the STFC DiRAC HPC Facility (www.dirac.ac.uk), jointly funded by STFC and the Large Facilities Capital Fund of BIS via STFC capital grants ST/K000373/1 and ST/R002363/1 and STFC DiRAC Operations grant ST/R001014/1. DiRAC is part of the National e-Infrastructure. We thank Mohamed Hibat Allah for helping with the flyby setup at an early stage of this work. This work made extensive use of the NASA ADS data base. Publisher Copyright: {\textcopyright} 2018 The Author(s).",
year = "2019",
month = mar,
day = "1",
doi = "10.1093/mnras/sty3325",
language = "English",
volume = "483",
pages = "4114--4139",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",
}