# Constraints on decreases in η Carinae's mass-loss from 3D hydrodynamic simulations of its binary colliding winds

@article{Madura2013ConstraintsOD,
title={Constraints on decreases in $\eta$ Carinae's mass-loss from 3D hydrodynamic simulations of its binary colliding winds},
author={Thomas I. Madura and Theodore R. Gull and Atsuo T. Okazaki and Christopher Michael Post Russell and Stanley P. Owocki and Jose H Groh and Michael F. Corcoran and Kenji Hamaguchi and Mairan Macedo Teodoro},
journal={Monthly Notices of the Royal Astronomical Society},
year={2013},
volume={436},
pages={3820-3855}
}
• Published 1 October 2013
• Physics
• Monthly Notices of the Royal Astronomical Society
Recent work suggests that the mass-loss rate of the primary star Eta-A in the massive colliding wind binary Eta Carinae dropped by a factor of 2-3 between 1999 and 2010. We present result from large- (+/- 1545 au) and small- (+/- 155 au) domain, 3D smoothed particle hydrodynamics (SPH) simulations of Eta Car's colliding winds for three Eta-A mass-loss rates ( (dot-M(sub Eta-A) = 2.4, 4.8 and 8.5 10(exp 4) M(solar)/ yr), investigating the effects on the dynamics of the binary wind-wind collision…

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## References

SHOWING 1-10 OF 89 REFERENCES
Modelling the RXTE light curve of η Carinae from a 3D SPH simulation of its binary wind collision
• Physics
• 2008
The very massive star system η Carinae exhibits regular 5.54-year (2024-day) period disruptive events in wavebands ranging from the radio to X-ray. There is a growing consensus that these events
Spiralling out of control: 3D hydrodynamical modelling of the colliding winds in $\eta\thinspace$Carinae
• Physics
• 2010
Three dimensional (3D) adaptive-mesh refinement (AMR) hydrodynamical simulations of the wind-wind collision between the enigmatic super-massive star \etacar and its mysterious companion star are
3D models of radiatively driven colliding winds in massive O+O star binaries – I. Hydrodynamics
The dynamics of the wind–wind collision in massive stellar binaries are investigated using 3D hydrodynamical models which incorporate gravity, the driving of the winds, the orbital motion of the
A 3D dynamical model of the colliding winds in binary systems
• Physics
• 2008
We present a three-dimensional (3D) dynamical model of the orbital-induced curvature of the wind–wind collision region in binary star systems. Momentum balance equations are used to determine the
SPIRALING OUT OF CONTROL: THREE-DIMENSIONAL HYDRODYNAMICAL MODELING OF THE COLLIDING WINDS IN η CARINAE
• Physics
• 2011
Three-dimensional adaptive mesh refinement hydrodynamical simulations of the wind-wind collision between the enigmatic supermassive star η Car and its mysterious companion star are presented which
3D modelling of the colliding winds in η Carinae – evidence for radiative inhibition
• Physics
• 2009
The X-ray emission from the super-massive star η Car is simulated using a three dimensional model of the wind-wind collision. In the model the intrinsic X-ray emission is spatially extended and
Stagnation-point flow in colliding-wind binary systems
• Physics
• 1994
The low X-ray temperatures and luminosities of colliding wind binaries compared to theoretical expectations has been a long standing problem. As a potential solution to this problem we present
Constraining the absolute orientation of η Carinae’s binary orbit: a 3D dynamical model for the broad [Fe iii] emission
• Physics, Geology
• 2011
We present a three-dimensional (3-D) dynamical model for the broad [Fe III] emission observed in Eta Carinae using the Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS). This
The extended interacting wind structure of Eta Carinae
• Physics
• 2009
The highly eccentric binary system, η Car, provides clues to the transition of massive stars from hydrogen-burning via the CNO cycle to a helium-burning evolutionary state. The fastmoving wind of η