Hi Thejas,
In the Einstein Toolkit, we use, as is common in numerical relativity,
units where the speed of light, c, and the gravitational constant, G, are
chosen to be c=G=1. In addition, we measure mass in units of the solar
mass, M_sun. 1 solar mass can be converted into a length by multiplying by
G and dividing by c^2. This is then the unit of length. We can convert
that into a time by dividing by c. So the unit of length and time in SI
units are then
[L] = 1 M_sun*G/c^2 = 1477 m.
[T] = 1 M_sun*G/c^3 = 4.93 10^-6 s.
As can be seen, the unit of length is 1 half the Scharzschild radius of a
black hole with a mass of 1 solar mass. The unit if time is then the time
it takes light to travel that distance.
Cheers,
Peter
On Thu, 10 Aug 2023, Thejas A Nair wrote:
Hi,
I had a doubt about this graph, Why do we have a 'Mass of the sun' parameter
in the x-axis, What is the logic behind it?
Warm Regards
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