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Hi Samuel and Roland,</div>
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<br>
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I can suggest to start from the tutorial I gave at the RIT last summer that you can find on this repository:</div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><a href="https://bitbucket.org/canuda/canuda_tutorial_scalar_rit_july2023/src/main/" id="LPlnk483948" class="OWAAutoLink" data-loopstyle="linkonly">https://bitbucket.org/canuda/canuda_tutorial_scalar_rit_july2023/src/main/</a></span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Here you can find a complete tutorial and some example parameter files of a black hole
binary coupled to a massive scalar field (with or without backreaction). All the parameter files here run with the ET_2023_05 release of the toolkit so I advise to use that version to run this parameter files.</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Let me know if you have any other question.</span></div>
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</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Best,</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Giuseppe</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><b>From:</b> Roland Haas<br>
<b>Sent:</b> Friday, February 16, 2024 11:31<br>
<b>To:</b> users@einsteintoolkit.org; samuel.gomez.1940@student.uu.se<br>
<b>Cc:</b> Miguel Zilhão; Witek, Helvi; Giuseppe Ficarra<br>
<b>Subject:</b> Re: [Users] Parameter file for a binary BH merger immersed in a scalar field
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<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Hello Samuel,<br>
<br>
Sorry for the long delay in responding. We are experiencing some issues<br>
with the mailing list making incoming emails not be correctly forwarded<br>
all the time.<br>
<br>
Thank you for your interest in the toolkit.<br>
<br>
The thorns in the Canuda repository (ScalarBase, ScalarEvolve, etc.)<br>
would indeed seem to be suitable for your application and<br>
somewhat similar research is being done in Helvi Witek's research group<br>
at UIUC, who is also one of the maintainers and authors of the Canuda<br>
code.<br>
<br>
I believe that e.g. initial data can be produces using eg the<br>
TwoPunctures_KerrProca thorn (or a slight modification of it if a<br>
scalar rather than a Proca field is required).<br>
<br>
I have put her and the other maintainers (as listed in the README file)<br>
in CC. They may most likely be able to provide more detailed comments<br>
(or redirect you to a colleague closer to your timezone that can help).<br>
<br>
Yours,<br>
Roland<br>
<br>
> Hi!<br>
><br>
> My name is Samuel Gómez, physics student doing his master in Uppsala<br>
> university, Sweden. Currently I am doing my master thesis with Joshua<br>
> Eby from Stockholm University about the phenomenology of<br>
> Gravitational Atoms around Neutron Stars and Black Holes.<br>
><br>
> I would like to perform numerical simulations for a BH binary merger<br>
> around a scalar cloud with EinsteinToolkit. From now, I have been<br>
> able to simulate the example of the TOV star given in the<br>
> EinteinToolkit official page in my laptop and soon I will gain access<br>
> to a computer cluster where I hopefully will be able to install the<br>
> Toolkit and perform a simulation for the example of a binary merger.<br>
> But my aim is to be able to perform, maybe in its simplest version, a<br>
> simulation of a merger around a scalar field, extracting information<br>
> about both the evolution of the BHs and the scalar field itself.<br>
><br>
> The problem I face is that I am not sure at all if I will be able to<br>
> do it without any parameter file. As far as I understood, my current<br>
> version of the Toolkit already has installed thorns related with the<br>
> implementation of a scalar field (if I am not mistaken, one example<br>
> is ScalarBase). I thus send this email asking if it is possible to<br>
> obtain a parameter file for simulating this scenario, or to provide<br>
> me with any information about an existing tutorial on how to write<br>
> one. Something like this would help me a lot. I would appreciate any<br>
> answer.<br>
><br>
> Thanks!<br>
<br>
<br>
--<br>
My email is as private as my paper mail. I therefore support encrypting<br>
and signing email messages. Get my PGP key from <a href="http://pgp.mit.edu" target="_blank" id="OWA0e773e50-cb67-3a14-21cb-4a7a2b786b84" class="OWAAutoLink" rel="noopener noreferrer" data-loopstyle="linkonly" data-auth="NotApplicable">
http://pgp.mit.edu</a> .<br>
</span></div>
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