Toward a dynamical shift condition for unequal mass black hole binary simulations

Doreen Müller (1) , Bernd Brügmann (1)

1 Theoretical Physics Institute

Moving puncture simulations of black hole binaries rely on a specific gauge choice that leads to approximately stationary coordinates near each black hole. Part of the shift condition is a damping parameter, which has to be properly chosen for stable evolutions. However, a constant damping parameter does not account for the difference in mass in unequal mass binaries. We introduce a position dependent shift damping that addresses this problem. Although the coordinates change, the changes in the extracted gravitational waves are small.

Mots clés: 04.25.D-; 04.25.dg; 04.30.Db

Doreen Müller, Bernd Brügmann. Toward a dynamical shift condition for unequal mass black hole binary simulations. Classical and Quantum Gravity, 2010, 27 (11), pp.114008. ⟨10.1088/0264-9381/27/11/114008⟩. ⟨hal-00598582⟩