Abstract
We present new calculations of local-thermodynamic-equilibrium (LTE) light element opacities from the Los Alamos ATOMIC code [1] for systems of astrophysical interest. ATOMIC is a multi-purpose code that can generate LTE or non-LTE quantities of interest at various levels of approximation. Our calculations, which include fine-structure detail, represent a systematic improvement over previous Los Alamos opacity calculations using the LEDCOP legacy code [2]. The ATOMIC code uses ab-initio atomic structure data computed from the CATS code, which is based on Cowan's atomic structure codes [3], and photoionization cross section data computed from the Los Alamos ionization code GIPPER [4]. ATOMIC also incorporates a new equation-of-state (EOS) model based on the chemical picture [5]. ATOMIC incorporates some physics packages from LEDCOP and also includes additional physical processes, such as improved free-free cross sections and additional scattering mechanisms. Our new calculations are made for elements of astrophysical interest and for a wide range of temperatures and densities.
Original language | English |
---|---|
Title of host publication | Eighth International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012 |
Pages | 17-26 |
Number of pages | 10 |
Volume | 1545 |
DOIs | |
Publication status | Published - 2013 |
Externally published | Yes |
Event | 8th International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012 - Gaithersburg, MD, United States Duration: 30 Sept 2012 → 04 Oct 2012 |
Conference
Conference | 8th International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012 |
---|---|
Country/Territory | United States |
City | Gaithersburg, MD |
Period | 30/09/2012 → 04/10/2012 |
ASJC Scopus subject areas
- General Physics and Astronomy