Intergalactic clumping paper published
Sadain et al. compare recombinations in Lumina and THESAN, showing how gas temperature and ionization structure shape the photon budget. The study is published in The Open Journal of Astrophysics.
Read paper- Resolution elements
- 2 × 6000³
- Simulation volume
- (500 cMpc)³
- Redshift range
- z = 49 → 3
- Baryonic mass resolution
- 3.6 × 10⁶ M⊙
- CPU cores
- 105,504
- AMD GPUs
- 7,536
Lumina is a large-volume cosmological radiation-hydrodynamics simulation that follows the Universe from the Dark Ages to the end of He II reionization at z = 3. It couples the IllustrisTNG galaxy-formation model to on-the-fly radiative transfer, non-equilibrium chemistry, and ionizing sources including stars, AGN, X-ray binaries, and shock-heated gas. More details are available on the project page.
With an unprecedented 500 cMpc volume and nearly half a trillion resolution elements, Lumina defines a new class of simulation that captures both the galaxy populations driving hydrogen reionization and the rare quasars driving helium reionization. The simulation is designed to interpret observables such as the Lyman-α forest, 21-cm cosmology, line-intensity mapping, galaxy surveys, quasar absorption spectra, and other probes of the evolving large-scale ionized structure of the intergalactic medium, while using improved initial conditions with separate baryon and dark-matter transfer functions and their relative streaming velocity. Explore the publications or access available data products.
Scientific Objectives
Four linked goals guide Lumina, connecting galaxies, reionization, and observable signatures in a single simulation.
High-redshift galaxies
Follow how galaxies form, grow, and respond to radiation feedback from cosmic dawn to z = 3.
Hydrogen reionization
Measure when hydrogen reionization occurs, how patchy it is, and which galaxies drive it.
Helium reionization
Model AGN-driven He II reionization and its impact on the thermal state of the intergalactic medium.
Observable signatures
Make predictions for high-redshift galaxies and probes of large-scale ionized structure of the intergalactic medium.
Latest News & Updates
New paper on ionized bubbles and neutral islands
Neyer et al. use Lumina to measure the sizes, shapes, and gas properties of ionized bubbles and the neutral islands that persist near the end of reionization.
Read paperLumina reference paper accepted by MNRAS
The Lumina reference paper has been accepted for publication in Monthly Notices of the Royal Astronomical Society.
Read paperExplore Our Research
Start with the project overview, then explore the publications and available data products.