Hello everyone,
I want to ask that if we compute any space-time in EinsteinExact arrangement in initial data form where we can can use this initial data set? what is the physical significance of this thorn arrangement. Your help will be highly appreciated.
Nisa
There are two important use cases for this arrangement:
(1) To test the Einstein Toolkit; by re-caculating a knows solution one confirms that the spacetime geometry solver in the Einstein Toolkit is working as expected.
(2) To analyse these spacetimes or to evolve test fields in them. For example, we can study the behaviour of horizons in known solutions, or trace geodesics, or evolve test matter fields in these spacetimes. Those calculations might otherwise be impossible, even though the geometry of the spacetime is known analytically. See e.g. < https://arxiv.org/abs/gr-qc/0511017%3E or https://arxiv.org/abs/1007.2990 for examples.
-erik
On Mon, Jan 22, 2018 at 9:18 AM, Nisa Amir nisaamir@math.qau.edu.pk wrote:
Hello everyone,
I want to ask that if we compute any space-time in EinsteinExact arrangement in initial data form where we can can use this initial data set? what is the physical significance of this thorn arrangement. Your help will be highly appreciated.
Users mailing list Users@einsteintoolkit.org http://lists.einsteintoolkit.org/mailman/listinfo/users
Hello Nisa,
I want to ask that if we compute any space-time in EinsteinExact arrangement in initial data form where we can can use this initial data set? what is the physical significance of this thorn arrangement. Your help will be highly appreciated.
You can use the initial data provided by the thorns in EinsteinExact with any spacetime evolution thorn compatible with the Einstein Toolkit eg the McLachlan throrn that is part of the Einstein Toolkit.
They can also be used as a background metric for eg a test-field evolution code (either a hydrodynamics simulation using GRHydro or IllinoisGRMHD) or a more exotic field for example using the proca field evolution thorn that has recently been proposed for inclusion in the Einstein Toolkit.
What particular application would you have in mind?
Yours, Roland
Thanks for the clarification.
On 22 Jan 2018 11:44 pm, "Roland Haas" roland.haas@physics.gatech.edu wrote:
Hello Nisa,
I want to ask that if we compute any space-time in EinsteinExact arrangement in initial data form where we can can use this initial data set? what is the physical significance of this thorn arrangement. Your help will be highly appreciated.
You can use the initial data provided by the thorns in EinsteinExact with any spacetime evolution thorn compatible with the Einstein Toolkit eg the McLachlan throrn that is part of the Einstein Toolkit.
They can also be used as a background metric for eg a test-field evolution code (either a hydrodynamics simulation using GRHydro or IllinoisGRMHD) or a more exotic field for example using the proca field evolution thorn that has recently been proposed for inclusion in the Einstein Toolkit.
What particular application would you have in mind?
Yours, Roland
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users@lists.einsteintoolkit.org
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Erik Schnetter -
Nisa Amir -
Roland Haas