yt Version 2.3 Announcement
@ Stephen Skory | Thursday, Dec 15, 2011 | 2 minute read | Update at Thursday, Dec 15, 2011

Just in time for the New Year, we’re happy to announce the release of yt version 2.3! ( ) The new version includes many new modules and enhancements, and the usual set of bug fixes over the last point release. We encourage all users to upgrade to take advantage of the changes.

yt is a community-developed analysis and visualization toolkit for astrophysical simulation data. yt provides full support for Enzo, Orion, Nyx, and FLASH codes, with preliminary support for the RAMSES code (and a handful of others.) It can be used to create many common types of data products, as well as serving as a library for developing your own data reductions and processes.

Below is a non-comprehensive list of new features and enhancements:

  • Improved and expanded documentation located at
  • Boolean logic data containers (joins, intersections and nots) to select arbitrary data regions.
  • Multi-level parallelism for subgroups of MPI tasks.
  • Extensive answer tests.
  • Isocontouring and flux-over-surface calculations, with WebGL interface.
  • A reorganized field system.
  • Adaptive resolution HEALpix-based all-sky volume rendering.
  • Radial column density calculations.
  • Memory usage, performance enhancements and bug fixes throughout the code.

Everything, from installation, to development, to a cookbook, can be found on the homepage:

We have updated the libraries installed with the install script; for more information, see the “Dependencies” section of the yt docs at

Development has been sponsored by the NSF, DOE, and various University funding. We invite you to get involved with developing and using yt!

We’re also holding the FIRST YT WORKSHOP from January 24-26 at the FLASH center in Chicago. See the workshop homepage for more information!

Please forward this announcement to interested parties.


The yt development team

yt extension modules

yt has many extension packages to help you in your scientific workflow! Check these out, or create your own.


ytini is set of tools and tutorials for using yt as a tool inside the 3D visual effects software Houdini or a data pre-processor externally to Houdini.


Trident is a full-featured tool that projects arbitrary sightlines through astrophysical hydrodynamics simulations for generating mock spectral observations of the IGM and CGM.


pyXSIM is a Python package for simulating X-ray observations from astrophysical sources.


Analyze merger tree data from multiple sources. It’s yt for merger trees!


yt_idv is a package for interactive volume rendering with yt! It provides interactive visualization using OpenGL for datasets loaded in yt. It is written to provide both scripting and interactive access.


widgyts is a jupyter widgets extension for yt, backed by rust/webassembly to allow for browser-based, interactive exploration of data from yt.


yt_astro_analysis is the yt extension package for astrophysical analysis.

Make your own!!

Finally, check out our development docs on writing your own yt extensions!

Contributing to the Blog

Are you interested in contributing to the yt blog?

Check out our post on contributing to the blog for a guide!

We welcome contributions from all members of the yt community. Feel free to reach out if you need any help.

the yt data hub

The yt hub at has a ton of resources to check out, whether you have yt installed or not.

The collections host all sorts of data that can be loaded with yt. Some have been used in publications, and others are used as sample frontend data for yt. Maybe there’s data from your simulation software?

The rafts host the yt quickstart notebooks, where you can interact with yt in the browser, without needing to install it locally. Check out some of the other rafts too, like the widgyts release notebooks – a demo of the widgyts yt extension pacakge; or the notebooks from the CCA workshop – a user’s workshop on using yt.

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