March 8, 2016

# Animations of stellar collisions

These are some animations from the simulations of Freitag & Benz 2005. The choice is biased towards special cases whose outcome was sufficiently surprising to be worth of a check. Each image is clickable and points to the corresponding youtube video.

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.

M1=0.5 Msun M2=0.5 Msun, Vrel=0.05 Vstar, dmin=0.30(R1+R2), Density

M1=0.5 Msun M2=0.5 Msun, Vrel=0.05 Vstar, dmin=0.80(R1+R2), xy

M1=0.5 Msun M2=0.5 Msun, Vrel=0.05 Vstar, dmin=0.80(R1+R2), xz

M1=0.5 Msun M2=0.5 Msun, Vrel=0.05 Vstar, dmin=0.80(R1+R2), rho

M1=1.2 Msun M2=1 Msun, Vrel=3.74 Vstar, dmin=0.07(R1+R2), rho

M1=1.2 Msun M2=1 Msun, Vrel=3.74 Vstar, dmin=0.07(R1+R2), rho zoom

M1=2 Msun M2=0.2 Msun, Vrel=10.03 Vstar, dmin=0.10(R1+R2), rho

M1=2 Msun M2=0.2 Msun, Vrel=10.03 Vstar, dmin=0.10(R1+R2), thermal energy

M1=2 Msun M2=2 Msun, Vrel=0.77 Vstar, dmin=0(R1+R2), rho

M1=2 Msun M2=2 Msun, Vrel=0.77 Vstar, dmin=0.10(R1+R2), rho

M1=2 Msun M2=2 Msun, Vrel=4.60 Vstar, dmin=0(R1+R2), rho

M1=2 Msun M2=2 Msun, Vrel=4.60 Vstar, dmin=0(R1+R2), rho zoom

M1=2 Msun M2=2 Msun, Vrel=6.89 Vstar, dmin=0(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=0.71 Vstar, dmin=0.12(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=0.71 Vstar, dmin=0.25(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=0.71 Vstar, dmin=0.33(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=3.53 Vstar, dmin=0.03(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=3.53 Vstar, dmin=0.03(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=3.53 Vstar, dmin=0.03(R1+R2), temperature

M1=3 Msun M2=1 Msun, Vrel=7.06 Vstar, dmin=0.24(R1+R2), rho

M1=3 Msun M2=1 Msun, Vrel=21.18 Vstar, dmin=0.25(R1+R2), rho

M1=5 Msun M2=1 Msun, Vrel=0.06 Vstar, dmin=0.10(R1+R2), rho

M1=5 Msun M2=1 Msun, Vrel=0.06 Vstar, dmin=0.20(R1+R2), rho

M1=5 Msun M2=1 Msun, Vrel=0.06 Vstar, dmin=0.30(R1+R2), rho

M1=5 Msun M2=1 Msun, Vrel=0.06 Vstar, dmin=0.40(R1+R2), rho

M1=5 Msun M2=1 Msun, Vrel=0.06 Vstar, dmin=0.43(R1+R2), rho

M1=7 Msun M2=1.7 Msun, Vrel=3.68 Vstar, dmin=0(R1+R2), rho large scale

M1=7 Msun M2=1.7 Msun, Vrel=3.68 Vstar, dmin=0(R1+R2), rho small scale

M1=7 Msun M2=1.7 Msun, Vrel=3.68 Vstar, dmin=0(R1+R2), temperature small scale

M1=14.745 Msun M2=2.5 Msun, Vrel=5.32 Vstar, dmin=0.15(R1+R2), rho

M1=19.321 Msun M2=0.909 Msun, Vrel=4.87 Vstar, dmin=0(R1+R2), rho

M1=19.321 Msun M2=1 Msun, Vrel=14.77 Vstar, dmin=0.20(R1+R2), rho

M1=19.321 Msun M2=1 Msun, Vrel=14.77 Vstar, dmin=0.20(R1+R2), thermal energy

M1=19.321 Msun M2=1 Msun, Vrel=29.55 Vstar, dmin=0.30(R1+R2), rho

M1=19.321 Msun M2=1 Msun, Vrel=49.24 Vstar, dmin=0.30(R1+R2), rho

M1=19.321 Msun M2=2.5 Msun, Vrel=1.53 Vstar, dmin=0.15(R1+R2), rho