[Users] (no subject)

[Zach Etienne]

Hi Thejas,

The oscillations in the maximum density inside the neutron star are due to
numerical errors. Try increasing the numerical resolution, and you'll find
that they converge away. Numerical errors stem from many causes: the sharp
dropoff of density where the neutron star touches the artificial
atmosphere, uneven resolution (the spherical star is being modeled inside a
cubical grid), reconstruction of hydrodynamic variables, derivatives of the
metric source terms, spacetime evolution errors, time evolution errors,
etc. So while you ask about the "physics" of a single stable neutron star,
the dynamics you are seeing are the result of the approximate "numerical"
algorithms used to model it.

-Zach

*     *     *
Zachariah Etienne
Assoc. Prof. of Physics, U. of Idaho
Adjunct Assoc. Prof. of Physics & Astronomy, West Virginia U.
https://etienneresearch.com
https://blackholesathome.net


On Sun, Aug 13, 2023 at 2:14 AM Thejas A Nair <thejasanair275 at gmail.com>
wrote:

> Hi,
> I would like to know more physics about the single stable neutron star
> solved using the toolkit as part of my master's project. Would you be able
> to throw some light on this?
> And I have a question about the time scales used in this particular
> problem, they are of order 10^-6, usually, neutron stars are highly compact
> objects,  In this problem, the density was of the order 10^-3 why are these
> scales chosen, and this paper said (https://arxiv.org/abs/1111.3344.) the
> spikes in the graphs are due to the interaction with the artificial
> atmosphere I would like to know more about it.
> I am attaching my results.
> Warm regards
> _______________________________________________
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>
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