Density Contour in the Equatorial Plane

Equal mass irrotational binary

Polytropic index n=1

Compactness of neutron star : Gm/Rc^2 = 0.16

Initial orbital separation : r ~ 14.4 GM/c^2

White circle in the last stage : Apparent horizon

(633, 633, 317) grid point simulation; (181, 181) region is shown