@article{ea253085d4d5422a975e02a122b95cb9,
title = "Three-dimensional hydrodynamical models of wind and outburst-related accretion in symbiotic systems",
abstract = "Gravitationally focused wind accretion in binary systems consisting of an evolved star with a gaseous envelope and a compact accreting companion is a possible mechanism to explain mass transfer in symbiotic binaries. We study the mass accretion around the secondary caused by the strong wind from the primary late-type component using global three-dimensional hydrodynamic numerical simulations during quiescence and outburst stages. In particular, the dependence of the mass accretion rate on the mass-loss rate, wind parameters and phases of wind outburst development is considered. For a typical wind from an asymptotic giant branch star with a mass-loss rate of 10−6 M☉ yr−1 and wind speeds of 20-50 km s−1, the mass transfer through a focused wind results in efficient infall on to the secondary. Accretion rates on to the secondary of 5-20 per cent of the mass-loss from the primary are obtained during quiescence and outburst periods where the wind velocity and mass-loss rates are varied, about 20-50 per cent larger than in the standard Bondi-Hoyle-Lyttleton approximation. This mechanism could be an important method for explaining observed accretion luminosities and periodic modulations in the accretion rates for a broad range of interacting binary systems.",
keywords = "Accretion, Accretion discs, Binaries: symbiotic, Circumstellar matter, Methods: numerical, Stars: mass-loss",
author = "{de Val-Borro}, M. and M. Karovska and Sasselov, {D. D.} and Stone, {J. M.}",
note = "Funding Information: MNRAS 468, 3408-3417 (2017) anonymous referee for carefully reading our paper and providing constructive comments. The numerical codes used in this article are based on the open source PIERNIK code, and the publicly available FLASH code, which is in part developed by the DOE NNSA-ASC OASCR Flash Center at the University of Chicago. We especially thank Artur Gawryszczak and Kacper Kowalik for many useful discussions on the PIERNIK code. All the analysis and visualization of the data were carried out using the YT toolset by Turk et al. (2011)3 and the PYNBODY package (Pontzen et al. 2013).4 The simulations presented in this work were performed on computational resources supported by the Princeton Institute for Computational Science and Engineering (PICSciE) and the Office of Information Technology's High Performance Computing Center and Visualization Laboratory at Princeton University. This research has made use of NASA's Astrophysics Data System. Funding Information: MK acknowledges support provided by NASA grants HST GO-NAS12761 and Chandra GO02-13031, and support from the Chandra X-ray Center operated by the Smithsonian Astrophysical Observatory under NASA Contract NAS8-03060. MdVB was supported by NASA{\textquoteright}s Planetary Astronomy Program. We thank the anonymous referee for carefully reading our paper and providing constructive comments. The numerical codes used in this article are based on the open source PIERNIK code, and the publicly available FLASH code, which is in part developed by the DOE NNSA-ASC OASCR Flash Center at the University of Chicago. We especially thank Artur Gawryszczak and Kacper Kowalik for many useful discussions on the PIERNIK code. All the analysis and visualization of the data were carried out using the YT toolset by Turk et al. (2011)3 and the PYNBODY package (Pontzen et al. 2013).4 The simulations presented in this work were performed on computational resources supported by the Princeton Institute for Computational Science and Engineering (PICSciE) and the Office of Information Technology{\textquoteright}s High Performance Computing Center and Visualization Laboratory at Princeton University. This research has made use of NASA{\textquoteright}s Astrophysics Data System. Publisher Copyright: {\textcopyright} 2017 The Authors",
year = "2017",
month = jul,
day = "1",
doi = "10.1093/mnras/stx684",
language = "English (US)",
volume = "468",
pages = "3408--3417",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",
}