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CHIANTI
Search CHIANTI, an atomic database for spectroscopic diagnostics of astrophysical plasmas.
CHIANTIchiantidatabase.orgVisit siteAbout CHIANTI
CHIANTI is an atomic database and software package for spectroscopic diagnostics of astrophysical plasmas. It provides a critically evaluated set of up-to-date atomic data and programs written in Interactive Data Language (IDL) and Python that calculate spectra from astrophysical plasmas.
The package is freely available. Users are asked to acknowledge CHIANTI when they use it. The current IDL routines are version 11.0.5, a minor update that improves ch_setup_ion and ch_synthetic for very large ion models. Solarsoft users are asked to update their distribution, and other users can download the IDL routines from the download page. The project is listed as a collaboration between George Mason University, the University of Michigan, the University of Cambridge, and NASA Goddard Space Flight Center.
Key features
- Critically evaluated set of atomic data for astrophysical plasmas
- IDL programs that calculate spectra from astrophysical plasmas
- Python programs for calculating spectra from astrophysical plasmas
- Version 11.0.5 IDL update improving ch_setup_ion and ch_synthetic for large ion models
- IDL routines distributed through Solarsoft or a direct download page
Best for: Researchers and students who need atomic data and IDL or Python tools to calculate spectra from astrophysical plasmas.
Good for
- The atomic data are described as critically evaluated and up to date
- The package is stated to be freely available
- Development is credited to several research institutions and funding agencies
CHIANTI at a glance
- Website
- chiantidatabase.org
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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CHIANTI FAQ
Is CHIANTI free to use?
The CHIANTI package is stated to be freely available. Users are asked to appropriately acknowledge CHIANTI when they use it.
What programming languages are the CHIANTI tools written in?
The programs are written in Interactive Data Language (IDL) and Python.
How do I get the CHIANTI IDL routines?
The IDL routines can be downloaded from the download page. Solarsoft users should update their Solarsoft distribution instead.
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