Light element opacities of astrophysical interest from ATOMIC

J. Colgan, D. P. Kilcrease, N. H. Magee, G. S J Armstrong, J. Abdallah, M. E. Sherrill, C J Fontes, H. L. Zhang, P. Hakel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

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 languageEnglish
Title of host publicationEighth International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012
Pages17-26
Number of pages10
Volume1545
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event8th International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012 - Gaithersburg, MD, United States
Duration: 30 Sep 201204 Oct 2012

Conference

Conference8th International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012
CountryUnited States
CityGaithersburg, MD
Period30/09/201204/10/2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Light element opacities of astrophysical interest from ATOMIC'. Together they form a unique fingerprint.

  • Cite this

    Colgan, J., Kilcrease, D. P., Magee, N. H., Armstrong, G. S. J., Abdallah, J., Sherrill, M. E., Fontes, C. J., Zhang, H. L., & Hakel, P. (2013). Light element opacities of astrophysical interest from ATOMIC. In Eighth International Conference on Atomic and Molecular Data and Their Applications, ICAMDATA 2012 (Vol. 1545, pp. 17-26) https://doi.org/10.1063/1.4815837