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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 23 Sep '24

23 Sep '24

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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Open slots for NR community calls
by Nils Vu 23 Sep '24

23 Sep '24

Dear Numerical Relativists, We have open slots to present at the NR community calls this season! Please sign up here if you would like to present at one of the calls starting Oct 7: - Request a slot to present at the NR community calls: https://github.com/sxs-collaboration/nr-community-call/wiki The NR community call is a monthly meeting to foster exchange between our numerical-relativity groups and codes. We usually have two speakers from different groups give brief (10-15min) talks, often on a technical aspect of the numerical-relativity code that they are working with, presenting what works well and what they are struggling with. The talks are followed by 15min of discussion. The speakers are preferably early-career researchers, so the calls are also a good opportunity to increase your visibility to our community. As always: - Feel free to circulate this information within the NR community. - Please subscribe to our mailing list <https://groups.google.com/u/1/a/black-holes.org/g/nr-community-call/> to receive info on the community calls in the future (or send a short message to nr-community-call+subscribe(a)black-holes.org <mailto:nr-community-call+subscribe@black-holes.org> to subscribe) and join our Slack <https://join.slack.com/t/generalrelativity/shared_invite/zt-dl4gqb6v-aAuw~p…> for discussions (channel: #nr-community-call <https://generalrelativity.slack.com/archives/C021LLTLK37>). - Details and schedule in the wiki: https://github.com/sxs-collaboration/nr-community-call/wiki Best, Nils — Nils Vu, Ph.D. (he/him) Sherman Fairchild Postdoctoral Fellow in Theoretical Astrophysics California Institute of Technology

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TOVSolver interpolation algorithm
by CJ Osakwe 23 Sep '24

23 Sep '24

Hello, 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. 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. Cheers, CJ Osakwe

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Meeting minutes for 2024-09-19
by Cupp, Samuel D. 19 Sep '24

19 Sep '24

Present: Sam, Roland, Steve, Bill, Zach, Lucas, Peter # ET Release: * currently proposed: David's ODESolver, Z4c thorn for CarpetX # Tickets * Several tickets regarding documentation; these thorns include additional packages or define new macros in the wrong place. These break when making the all-in-one documentation pdf. * 2820: PRs to resolve conflict between NewRadX and symmetry BCs still awaiting reviewer * 2818: no progress on failing tests with gcc-14 * 2814: Request to review PR to add tensoralias support in interface.ccl * 2786: PR needs to be revised now that unified Driver interface is supported by CarpetX * 2806: Roland needs to run more tests before accepting the PR #Other topics * Zach has been working to replace AEIlLocalInterp's dependency on Maple (closed-source) to Python. We can also use NRPy to further improve the thorn through its optimization methods. Next week: Chair - Peter Minute taker - Roland

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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 18 Sep '24

18 Sep '24

Hello, Please consider joining the weekly Einstein Toolkit phone call at 9:00 am US central time on Thursdays. For details on how to connect and what agenda items are to be discussed, use the link below. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 16 Sep '24

16 Sep '24

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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Meeting minutes for 2024-09-12
by Lucas Timotheo Sanches 12 Sep '24

12 Sep '24

Present: Lucas (minutes), Roland, Peter Diener, Maxwell Rizzo, Zach # Etienne(chair)Timeline: * Zach reminds us that the deadline for new features to be added to the main branch is September 27 * Roland reported that Hayley Macpherson said her cosmology code won't be ready for this release, maybe it will be for the next. * Sphyncs and Machlaclan: Peter implemented the BSSN improvements on Zach's paper. He says that further testing is needed. * Baikal: Zach implemented his BSSN improvements. # Questions in the mailing list * Zach encourages people to respond to the Fuka usage survey, as it will help not only FUKA but also its users on future presentations and grant reports. # Tickets ready for review * 2824: Test to see if we can add the `listings` to the top-level LaTeX file in the thorn guide generation. * 2823: Zach asks for reviewers of his student package. Roland says that Wolfgang K. has something that can help and will forward it. Maxwell is interested in reviewing. * 2813: Reaching final stages. Users should be ready to update their CarpetX codes that use the regrid error grid function. The change should be a simple modification in `interface.ccl` files.

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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 11 Sep '24

11 Sep '24

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Number of theses using the FUKA codes
by Tootle, Samuel (sdtootle＠uidaho.edu) 10 Sep '24

10 Sep '24

Dear NR enthusiasts, In an attempt to determine the utility of the Frankfurt University/KADATH (FUKA) initial data codes in support of student research, I am trying to ascertain the number of student theses that utilized the FUKA code. So, if you are a student or are working with a student and have used FUKA as part of your thesis work, it would be great if you could let me know. Warm regards, Samuel Tootle Postdoctoral Researcher University of Idaho https://samueltootle.github.io/

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 09 Sep '24

09 Sep '24

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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