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We present version 8 of the CHIANTI database. This version includes a large amount of new data and ions, which represent a significant improvement in the soft X-ray, EUV and UV spectral regions, which several space missions currently cover.…

Solar and Stellar Astrophysics · Physics 2015-10-14 G. Del Zanna , K. P. Dere , P. R. Young , E. Landi , H. E. Mason

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…

Atomic Physics · Physics 2021-03-10 G. Del Zanna , K. P. Dere , P. R. Young , E. Landi

CHIANTI contains a large quantity of atomic data for the analysis of astrophysical spectra. Programs are available in IDL and Python to perform calculation of the expected emergent spectrum from these sources. The database includes atomic…

Solar and Stellar Astrophysics · Physics 2019-04-03 Kenneth P. Dere , Giulio Del Zanna , Peter R. Young , Enrico Landi , Ralph S. Sutherland

We describe the 2017 release of the spectral synthesis code Cloudy. A major development since the previous release has been exporting the atomic data into external data files. This greatly simplifies updates and maintenance of the data.…

The CHIANTI atomic database was first released in 1996 and has had a huge impact on the analysis and modeling of emissions from astrophysical plasmas. The database has continued to be updated, with version 8 released in 2015. Atomic data…

Solar and Stellar Astrophysics · Physics 2016-04-20 Peter R. Young , Ken P. Dere , Enrico Landi , Giulio Del Zanna , Helen Mason

Version 11 of the CHIANTI database and software package is presented. Advanced ionization equilibrium models have been added for low charge states of seven elements (C, N, O, Ne, Mg, Si and S), and represent a significant improvement…

Solar and Stellar Astrophysics · Physics 2024-03-26 R. P. Dufresne , G. Del Zanna , P. R. Young , K. P. Dere , E. Deliporanidou , W. T. Barnes , E. Landi

We discuss new functionality of the spectral simulation code CLOUDY which allows the user to calculate grids with one or more initial parameters varied and formats the predicted spectra in the standard FITS format. These files can then be…

Astrophysics · Physics 2009-11-11 R. L. Porter , G. J. Ferland , S. B. Kraemer , B. K. Armentrout , K. A. Arnaud , T. J. Turner

We present the 2025 release of the spectral synthesis code Cloudy, highlighting significant enhancements to the scope and accuracy of the physics which have been made since the previous release. A major part of this development involves…

Astrophysical plasma codes are built on atomic databases. In the current atomic databases, R-matrix electron-impact excitation data of O-like ions are limited. The accuracy of plasma diagnostics with O-like ions depends on the availability…

Solar and Stellar Astrophysics · Physics 2021-09-15 Junjie Mao , N. R. Badnell , G. Del Zanna

We present an interface between the (magneto-) hydrodynamics code PLUTO and the plasma simulation and spectral synthesis code CLOUDY. By combining these codes, we constructed a new photoionization hydrodynamics solver: The PLUTO-CLOUDY…

Instrumentation and Methods for Astrophysics · Physics 2015-03-25 M. Salz , R. Banerjee , A. Mignone , P. C. Schneider , S. Czesla , J. H. M. M. Schmitt

We describe the latest release of AtomDB, version 2.0.2, a database of atomic data and a plasma modeling code with a focus on X-ray astronomy. This release includes several major updates to the fundamental atomic structure and process data…

High Energy Astrophysical Phenomena · Physics 2015-06-05 A. R. Foster , L. Ji , R. K. Smith , N. S. Brickhouse

Circuit depth reduction is of critical importance for quantum chemistry simulations on current and near term quantum computers. This issue is tackled by introducing a chemically aware strategy for the Unitary Coupled Cluster ansatz. The…

The trustworthiness of Machine Learning (ML) models can be difficult to assess, but is critical in high-risk or ethically sensitive applications. Many models are treated as a `black-box' where the reasoning or criteria for a final decision…

Machine Learning · Computer Science 2024-07-11 Saif Anwar , Nathan Griffiths , Abhir Bhalerao , Thomas Popham

A new code, based on the Quantum Molecular Dynamics theoretical approach, has been developed and interfaced to the FLUKA evaporation/fission/Fermi break-up module. At present, this code is undergoing a series of validation tests. In this…

Large language models (LLMs) have demonstrated impressive performance across various domains. However, for clinical diagnosis, higher expectations are required for LLM's reliability and sensitivity: thinking like physicians and remaining…

Computation and Language · Computer Science 2025-04-21 Chenwei Yan , Xiangling Fu , Yuxuan Xiong , Tianyi Wang , Siu Cheung Hui , Ji Wu , Xien Liu

Spectral lines from N-like ions can be used to measure the temperature and density of various types of astrophysical plasmas. The atomic databases of astrophysical plasma modelling codes still have room for improvement in their…

Solar and Stellar Astrophysics · Physics 2020-11-18 Junjie Mao , N. R. Badnell , G. Del Zanna

We present an update on CRDB (https://lpsc.in2p3.fr/crdb), the cosmic-ray database for charged species. CRDB is based on MySQL, queried and sorted by jquery and table-sorter libraries, and displayed via PHP web pages through the AJAX…

High Energy Astrophysical Phenomena · Physics 2020-07-27 D. Maurin , H. Dembinski , J. Gonzalez , I. C. Mariş , F. Melot

This paper presents the latest improvements introduced in Version 4 of the UQpy, Uncertainty Quantification with Python, library. In the latest version, the code was restructured to conform with the latest Python coding conventions,…

Accurate and comprehensive diatomic molecular spectroscopic data have long been vital in a wide variety of applications for measuring and monitoring astrophysical, industrial and other gaseous environments. These data are also used…

Chemical Physics · Physics 2021-03-19 Laura K. McKemmish

We present a new database of stellar evolution models for a large range of masses and chemical compositions, based on an up-to-date theoretical framework. We briefly discuss the physical inputs and the assumptions adopted in computing the…

Astrophysics · Physics 2010-12-09 S. Cassisi , A. Pietrinferni , M. Salaris , F. Castelli , D. Cordier , M. Castellani
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