<div dir="ltr">Dear Mario,<div><br></div><div>With the help of fellow Einstein Toolkit Maintainer Roland Haas, I wrote a library for reading in Cartesian grid data to AHFinderDirect and QuasiLocalMeasures (additional, isolated horizon diagnostics) from any numerical relativity code. The code is open source, and has been used to analyze horizons from spacetime data generated by NRPy+.</div><div><br></div><div>Here's how you get it:</div><div><br></div><div>git clone <a href="https://bitbucket.org/zach_etienne/et_minimal_2019_03.git">https://bitbucket.org/zach_etienne/et_minimal_2019_03.git</a><br></div><div>cd et_minimal_2019_03</div><div>git checkout remotes/origin/with_quasilocalmeasures</div><div><br></div><div>Check out the README.md</div><div><br></div><div><span style="font-size:12.8px">-Zach</span><br></div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px"><br></div><span style="font-size:12.8px">* * *</span><br style="font-size:12.8px"><span style="font-size:12.8px">Zachariah Etienne</span></div><div><span style="font-size:12.8px">Assoc. Prof. of Physics, U. of Idaho</span></div><div><span style="font-size:12.8px">Adjunct Assoc. Prof. of Physics & Astronomy, West Virginia U.</span></div><div dir="ltr"><div><a href="https://etienneresearch.com" target="_blank">https://etienneresearch.com</a></div><div><a href="https://blackholesathome.net/" target="_blank">https://blackholesathome.net</a><br></div></div></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 23, 2022 at 6:36 AM Mario Imbrogno <<a href="mailto:mario.imbrogno97@gmail.com">mario.imbrogno97@gmail.com</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 dir="auto"><div dir="auto">Dear Einstein-Toolkit community, </div><div dir="auto"><br></div><div dir="auto">my name is Mario Imbrogno and I am a Ph.D. student at </div><div dir="auto">the University of Calabria (UniCal, Cosenza, Italy) under the supervision of prof. Sergio Servidio.</div><div dir="auto"><br></div><div dir="auto">Our research group had developed a spectral code to solve the Einstein equations via a</div><div dir="auto">pseudo-spectral technique [Meringolo C, Servidio S, and Veltri P "A spectral method algorithm for numerical </div><div dir="auto">simulations of gravitational fields." Classical and Quantum Gravity 38.7 (2021): 075027], and I am studying different cases of merging two and more </div><div dir="auto">black holes, in vacuum conditions.</div><div dir="auto"><br></div><div dir="auto">Now I have to compute the apparent horizons (AHs) just for our initial conditions, and I have</div><div dir="auto">read that the Einstein Toolkit implements the AHFinderDirect, a code that can detect the AHs.</div><div dir="auto"><br></div><div dir="auto">My questions are: is there a way to compute such AHs by, just uploading our 3D cartesian BSSN fields and </div><div dir="auto">using the AHFinderDirect code? </div><div dir="auto"><br></div><div dir="auto">Who is(are) the user(s) that mainly use(s) such code? Who can I ask?</div><div dir="auto"><br></div><div dir="auto">Where can I find a detailed guide in which I can learn how to upload my data using the AHFinderDirect code?</div><div dir="auto"><br></div><div dir="auto">If someone will help us, there is no problem for us to include as a co-author of our paper.</div><div dir="auto"><br></div><div dir="auto">Best regards,</div><div dir="auto"><br></div><div dir="auto">Mario Imbrogno</div></div>
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