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ATOMDB Database

Presentation #318.02 in the session Laboratory Astrophysics Division (LAD): World of Databases I.

Published onJul 01, 2023
ATOMDB Database

The AtomDB project ( is a combination of a large atomic database and several spectral models designed for modeling emission from optically thin, X-ray emitting plasmas. The code and database are optimized in the EUV and X-ray ranges (1 < λ < 1240Å), although the models cover a wider range of spectra.

The database contains a large selection of atomic data covering collisional and radiative process for elements from hydrgoden to zinc. This database consists largely of theoretical calculations with occasional experimental cross checks. There are difficulties in directly using experimental atomic data in the AtomDB (or other!) atomic databases. We present here an outline of which missing experimental data which would be of benefit to the AtomDB project for modeling new and existing satellite data.

In addition, we describe our new tools for varying the uncertainties in atomic data, allowing systematic investigation of which lines and ratios are dependent on which atomic data. This same tool can be used to temporarily include experimental data in the database, along with a test suite of example astrophysical plasmas allowing experimentalists and theorists to see where their new data may make a difference to the astrophysics community.

We also present new data and models which have already been included in the most recent release of AtomDB. This includes our new model for resonant scattering, and its application to galaxy clusters and binary systems; updates to the charge exchange model, ACX2, including new data for low charge states; and a systematic update and expansion of our holdings on dielectronic recombination satellite lines to improve wavelengths and line emissivities.

Finally, time permitting, we discuss the synergies between different database projects and the opportunities that exist to share existing knowledge and avoid duplication of effort, in a bid to foster discussion and cross collaboration between database projects across astrophysics and avoid duplication.

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