Release Announcement
Click here to read the announcement in HTML (with hyperlinks):
https://einsteintoolkit.org/about/releases/ET_2026_05_announcement.html
We are pleased to announce the 31st release (code name “Hypatia”) of the Einstein Toolkit, an open-source, community-developed software infrastructure for relativistic astrophysics.
New thorns in this release:
* Cottonmouth (CottonmouthBSSNOK4m, CottonmouthZ4c4m, CottonmouthGaugeWaveID, CottonmouthLinearWaveID) — A new suite of GPU-accelerated spacetime evolution thorns for CarpetX.
* CanudaX (CanudaX_BSSNMoL, CanudaX_NPScalars, CanudaX_ExactID) — A new GPU-accelerated BSSN spacetime evolution suite for CarpetX,
* TwoPuncturesX — TwoPunctures for CarpetX.
* ET_BHaHAHA — A new apparent horizon finder.
A new gallery example: A BHNS star merger matching GW230529.
Updated thorns and components:
* CarpetX — Added support for integer and complex grid array and scalar types; pinned Particles in interpolation.
* GRHayL — Added Noble2D con2prim for tabulated equations of state; and tabulated EOS reader;
* GRHayLHD/GRHayLHDX — Uses a new tabulated EOS reader.
* NewRadX — Added support for CapyrX multipatch grids.
In addition, bug fixes accumulated since the previous release.
The Einstein Toolkit is a collection of software components and tools for simulating and analyzing general relativistic astrophysical systems. The Einstein Toolkit also contains a 1D self-force code.
The Einstein Toolkit uses a distributed software model and is maintained by staff and faculty from several institutions and host weekly meetings open to anyone.
The Einstein Toolkit is primarily supported by NSF 2411068 and also by NSF 2004157/2004044/2004311/2004879/2003893/2114582/2227105.