Version 10 (modified by spz, 5 years ago) (diff)

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Evolution of the triple star system Xi Tau in the constellation Taurus. The tertiary (outer) giant star overflows its Roche lobe at pericenter. We simulate the system using the AMUSE framework (see  http://www.amusecode.org), using a combination of stellar evolution, gravitational dynamics and hydrodynamics. Reference to the scientific paper:  http://adsabs.harvard.edu/abs/2014MNRAS.438.1909D. The script to simulate the evolution of this system can be downloaded from:  http://www.amusecode.org/doc/examples/.

Simulation of a star cluster starting from clumpy initial conditions. Includes the effect of mass loss from the stellar evolution. Simulated using AMUSE. Rendered as you would see it with the Hubble Space Telescope, if it would snap a picture every 31250 year, that is!

Evolution of the Pythagorean triple system of 3 objects with relative masses 3, 4 and 5, positioned on the corners of a triangle with coordinates (1, 3), (-2, -1) and (1, -1) in the $(x, y)$ plane. The equations of motion have been integrated until the system dissolves using two different integration methods. The red stars are integrated using a 4th order Hermite predictor corrector method (which conserves energy to 1/10{11}). The black stars give the converged solution (energy conservation better than 1/10{16} and with 3 decimal places accurate irrespective of the time step or the length of the mantissa) using the Brutus integrator (see  http://adsabs.harvard.edu/abs/2014ApJ...785L...3P). Both codes are available via the AMUSE software environment at  http://www.amusecode.org.