A few collision animations...

Here are a few movies I've done during my thesis work in order to check the working of the SPH code. Note that the choice is biaised towards special cases whose outcome I found sufficiently surprising to be worth of a check...

In the following table, M_sun and R_sun are the mass and radius of the sun. M_1 and M_2 are the (pre-collision) masses of the stars and R_1 and R_2 their radii. V_rel is the relative velocity at infinity, V_star=sqrt(2*G(M_1+M_2)/(R_1+R_2)) is the relative velocity the stars would have at contact for V_rel=0.

M_1 in M_sun	M_2 in M_sun	V_rel in V_star	d_min in (R_1+R_2)	.gif animation(s)	.mng animation(s)
0.500	0.500	0.05	0.30	density	density
0.500	0.500	0.05	0.80	density density density	density density density
1.200	1.000	3.74	0.07	density density	density density
2.000	0.200	10.03	0.10	density therm_energy	density therm_energy
2.000	2.000	0.77	0.00	density	density
2.000	2.000	0.77	0.10	density	density
2.000	2.000	4.60	0.00	density density	density density
2.000	2.000	6.89	0.00	density	density
3.000	1.000	0.71	0.12	density	density
3.000	1.000	0.71	0.25	density	density
3.000	1.000	0.71	0.33	density	density
3.000	1.000	3.53	0.03	density	density
3.000	1.000	3.53	0.03	density temperature	density temperature
3.000	1.000	7.06	0.24	density	density
3.000	1.000	21.18	0.25	density	density
5.000	1.000	0.06	0.10	density	density
5.000	1.000	0.06	0.20	density	density
5.000	1.000	0.06	0.30	density	density
5.000	1.000	0.06	0.40	density	density
5.000	1.000	0.06	0.43	density	density
7.000	1.700	3.68	0.00	density density temperature	density density temperature
14.745	2.500	5.32	0.15	density	density
19.321	0.909	4.87	0.00	density	density
19.321	1.000	14.77	0.20	density therm_energy	density therm_energy
19.321	1.000	29.55	0.30	density	density
19.321	1.000	49.24	0.30	density	density
19.321	2.500	1.53	0.15	density	density