ET Cactus and BAM ABS Simulations: New Results from Eccentricity-Reduced Configurations

We conduct research in the field of binary neutron stars. We use the numerical code Sgrid as an initial data generator. For numerical simulations, we use two different codes: BAM and the Einstein Toolkit (Cactus framework). Since both codes are being actively developed, we would like to compare results obtained independently based on the newest versions of both and validate them. In particular, we are focused on three cases significantly different from each other. We will use one previously known result for a relatively simple configuration to verify convergence. Next, we aim to investigate more challenging setups with (a) equal-mass but spinning NSs and (b) unequal-mass but spinless NSs. Both cases remain largely to be explored and hence active fields of investigation in the existing database, since the configurations we are dealing with require eccentricity reduction. Our research follows a three-step procedure: 1) initial data generation, 2) eccentricity reduction, and 3) time-dependent simulations. In my talk, I will briefly describe all three stages and present the final results.