Hi Erik and Frank,
Thank you very much for clearing up my confusion! I will try using both QuasiLocalMeasures and the ADMMass/AHFinderDirect combination.
All the best,
Gwyneth
On Sun, Jan 29, 2017 at 7:37 PM, Frank Loeffler knarf@cct.lsu.edu wrote:
On Sun, Jan 29, 2017 at 12:41:20PM +0200, Gwyneth Allwright wrote:
Hi All,
I've been trying to use the ADMMass thorn to calculate the ADM mass for a binary black hole system. The initial ADM mass given by TwoPunctures is 0.989, but ADMMass returns 0.031 (using both of the available methods).
Does anyone know what could be going wrong? Alternatively, are there other thorns that can be used to calculate the ADM mass?
The ADMMass thorn calculates the ADMMass by the spacetime, but not including punctures. The best way to go about that is to exclude the BH interior from the ADMMass calculation (there are already parameters for that), and to add the BH mass returned by the AHFinder (AHFinderDirect) to that for a total mass.
Frank