CHIANTI -- an atomic database for emission lines -- Paper XVI: Version 10, further extensions

TL;DR

The paper introduces version 10 of the CHIANTI atomic database, enhancing atomic models, adding new ions, and improving software for better plasma diagnostics in astrophysics.

Contribution

It provides updated atomic data and software improvements, especially for helium-like and Be-like ions, advancing plasma emission modeling capabilities.

Findings

Updated atomic models for key ions

Enhanced software performance and diagnostics

Addition of new ions and atomic rates

Abstract

We present version 10 of the CHIANTI package. In this release, we provide updated atomic models for several helium-like ions and for all the ions of the beryllium, carbon and magnesium isoelectronic sequences that are abundant in astrophysical plasmas. We include rates from large-scale atomic structure and scattering calculations that are in many cases a significant improvement over the previous version, especially for the Be-like sequence, which has useful line diagnostics to measure the electron density and temperature. We have also added new ions and updated several of them with new atomic rates and line identifications. Also, we have added several improvements to the IDL software, to speed up the calculations and to estimate the suppression of dielectronic recombination.