<div dir="ltr">Hi CJ Osakwe,<br><div><br></div><div>1D and 3D solutions look different because different coordinate systems are being used,</div><div>so the meaning of "radius" changes. More specifically, Schwarzschild coordinates in 1D, but</div><div>3D interpolation is performed with isotropic coordinates, which tend to be better behaved</div><div>for numerical relativity simulations. </div><div><br></div><div>You can find more information here:</div><div><a href="https://einsteintoolkit.org/thornguide/EinsteinInitialData/TOVSolver/documentation.html">https://einsteintoolkit.org/thornguide/EinsteinInitialData/TOVSolver/documentation.html</a><br></div><div><br></div><div>Best,</div><div>Gabriele</div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 13, 2024 at 10:31 AM CJ Osakwe <<a href="mailto:cuosakwe@ucalgary.ca">cuosakwe@ucalgary.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg6215345369673528679">
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Hello,</div>
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Thank you for your response to my previous inquiry. I am now trying to model a hybrid star in the Einstein Toolkit, and I have some questions about the algorithm in the TOVSolver thorn that takes the 1D solution to the TOV equations and interpolates it to the
3D grid.</div>
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I was able to extract the 1D data and plot it, but when I do, the pressure v. radius and density v. radius relations noticeably change (they both decrease sooner and reach zero sooner in the 3D case than the 1D case). I am wondering why this happens, and if
it should be expected.</div>
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Cheers,</div>
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CJ Osakwe<br>
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