[Users] ADMMass Issue

Gwyneth Allwright allgwy001 at myuct.ac.za
Sun Jan 29 13:30:22 CST 2017

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,


On Sun, Jan 29, 2017 at 7:37 PM, Frank Loeffler <knarf at 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
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