Data access
All raw data and many data products from the THESAN simulation suite are publicly available at this page through the Globus application. You can also follow a step-by-step tutorial.
Available data
Summary of main results
Predictions for common physical quantities from THESAN-1 are summarised below in machine-readable format. All files have an header describing the content of each (white space-separated) column.
Quantity | Data file | Relevant publication |
---|---|---|
Star-formation rate density | sfrd_Thesan1.dat | Kannan et al. 2022 |
Stellar-to-halo mass relation | smhm_Thesan1.dat | Kannan et al. 2022 |
Stellar mass function | smf_Thesan1.dat | Kannan et al. 2022 |
Galaxy main sequence | gms_Thesan1.dat | Garaldi et al. 2024 |
Mass-metallicity relation | mzr_Thesan1.dat | Garaldi et al. 2024 |
UV luminosity function | uvlf_Thesan1.dat | Kannan et al. 2022 |
Reionization history | reion_history_Thesan1.dat | Kannan et al. 2022 |
HI photoionization rate | Gamma_HI_Thesan1.dat | Garaldi et al. 2022 |
Mean free path | mfp_Thesan1.dat | Garaldi et al. 2022 |
IGM temperature | Tigm_Thesan1.dat | Kannan et al. 2022 |
Galaxy-IGM cross-correlation | galacc_Thesan1.dat | Garaldi et al. 2022 |
Full simulation data
Most THESAN data are similar in format to those from the IllustrisTNG simulations. Some novel data output and products have unique formats. Both are described below.
The raw output from a single THESAN simulation are listed here. You can get more information by clicking on the name of each entry.
- Snapshots : the full simulation output at 80 different cosmic times, between z=50 and z=5.5 (produced approximately every 10 Myr).
- Group catalogs : the properties of haloes and galaxies in the simulation, at 80 different cosmic times.
- Cartesian outputs : gas properties sampled on a Cartesian grid at high time cadence.
In addition to the raw data, we provide a number of data products, produced by post processing the THESAN data. The available data products are listed here. You can get more information by clicking on the name of each entry.
- simulation.hdf5 file : file linking datasets across output chunks, automating the loading process.
- eor.txt file : file with runtime global IGM properties.
- Merger trees : evolutionary tracks of galaxies in the simulation and their properties.
- Offset files : utility files that make easy to connect snapshot, groups and merger trees.
- Hashtables : utility files that make easy to load particles based on their spatial position.
- Cross-match files : utility files that make easy to find analog haloes across the different THESAN simulations.
- Lyman-alpha catalogs : intrinsic Lyman-α properties of galaxies in the simulation.
- Lines of sight : collection of gas properties extracted along random lines of sight through the simulation.
- Filament catalogs : the filaments identified in the simulation and their properties.
- Escape fraction catalogs: the escape fraction properties of galaxies in the simulation.
- Galaxy SED catalogs : the spectral energy distributions of simulated galaxies, obtained in post-processing from the star and dust distributions.
Not all data are available for all THESAN simulations because of physical or numerical limitations. The table below shows which data are available for each run.
Changelog
- 18/06/2024 - lines of sight: added lines of sight aligned with z direction (300 per snapshot) and lightcone-like lines of sight
- 21/03/2024 - SED: specified that SFR and StellarMass refer to the inner 30kpc of subhaloes
- 02/08/2023 - Renamed ThesanHR directories and placed in the main Thesan directory
- 30/07/2023 - New filaments catalogs! Files organised into subdirectories in the filaments directory.
General information about THESAN
Type | Component | |
---|---|---|
0 | Gas | |
1 | Dark matter | |
4 | Stars and wind particles | |
5 | Black holes |
Gas is discretized using a Voronoi tessellation. Its resolution elements can be treated as particles, but are of different nature within the simulation.
Each resolution element has a number of parameters associated, describing physical or numerical properties. The parameters associated depend on its type (
PartType
) and are described in the page dedicated to snapshots. Citation policy
- Kannan et al. (2022) -- Overview and galaxy properties;
- Garaldi et al. (2022) -- IGM and IGM--galaxy connection;
- Smith et al. (2022) -- Lyman-alpha emission and transmission;
- Garaldi et al. (2023) -- Data release and JWST comparison;
- Borrow et al. (2023) -- THESAN-HR;