PyAtomDB: Extending the AtomDB Atomic Database to Model New Plasma Processes and Uncertainties

• Main Authors: Adam R. Foster, Keri Heuer
• Format: Article
• Language: English
• Published: MDPI AG 2020-08-01
• Series: Atoms
• Subjects: X-ray spectroscopy; atomic data; spectral analysis; error analysis
• Online Access: https://www.mdpi.com/2218-2004/8/3/49

The AtomDB project provides models of X-ray and extreme ultraviolet emitting astrophysical spectra for optically thin, hot plasma. We present the new software package, PyAtomDB, which now underpins the entire project, providing access to the underlying database, collisional radiative model calculations, and spectrum generation for a range of models. PyAtomDB is easily extensible, allowing users to build new tools and models for use in analysis packages such as XSPEC. We present two of these, the <i>kappa</i> and ACX models for non-Maxwellian and Charge-Exchange plasmas respectively. In addition, PyAtomDB allows for full open access to the apec code, which underlies all of the AtomDB spectra and has enabled the development of a module for estimating the sensitivity of emission lines and diagnostic line ratios to uncertainties in the underlying atomic data. We present these publicly available tools and results for several X-ray diagnostics of Fe L-shell ions and He-like ions as examples.