A new generation of Los Alamos opacity tables

We review a recently completed set of Los Alamos OPLIB opacity tables for the elements hydrogen through zinc. Our tables have been computed using the Los Alamos ATOMIC code, which makes use of atomic structure calculations that include fine-structure detail for all the elements considered. We utilize an equation-of-state model, known as ChemEOS, that is based on the minimization of free energy in a chemical picture. Recent publications by us have compared our calculations to available experimental opacity data and to other opacity calculations. Our tables are publicly available via our website, and have already been used in solar modeling calculations as well as the modeling of pulsating B-type stars. This proceedings submission will give an overview of our opacity calculations and briefly review the conclusions from the astrophysical modeling.

[1]  Peter Schwerdtfeger,et al.  ATOMIC STATIC DIPOLE POLARIZABILITIES , 2006 .

[2]  F. Gilleron,et al.  Accounting for highly excited states in detailed opacity calculations , 2015, 1503.08939.

[3]  G. Rochau,et al.  Iron-plasma transmission measurements at temperatures above 150 eV. , 2007, Physical review letters.

[4]  G. Loisel,et al.  A higher-than-predicted measurement of iron opacity at solar interior temperatures , 2014, Nature.

[5]  杨 发成.  The theory of atomic structure , 2017 .

[6]  M. Asplund,et al.  The chemical composition of the Sun , 2009, 0909.0948.

[7]  J. B. Mann,et al.  Integral and Differential Cross Sections for Electron Impact Ionization , 1991 .

[8]  P. Walczak,et al.  Constraints on opacities from complex asteroseismology of B-type pulsators: the β Cephei star θ Ophiuchi , 2009, 0906.3121.

[9]  A. Ali,et al.  Theory of Resonance Broadening of Spectral Lines by Atom-Atom Impacts , 1965 .

[10]  J. Colgan,et al.  Self-consistent Large-Scale Collisional-Radiative Modeling , 2016 .

[11]  P. Walczak,et al.  Complex asteroseismology of the $\beta$ Cep/SPB pulsator $\nu$ Eridani: constraints on opacities , 2009, 0912.0622.

[12]  J. Ferguson,et al.  NEW SOLAR COMPOSITION: THE PROBLEM WITH SOLAR MODELS REVISITED , 2009, 0909.2668.

[13]  F. Rogers,et al.  Radiative atomic Rosseland mean opacity tables , 1992 .

[14]  W. R. Hindmarsh,et al.  Interpretation of collision broadening and shift in atomic spectra , 1967, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[15]  N. H. Magee,et al.  DETAILED OPACITY COMPARISON FOR AN IMPROVED STELLAR MODELING OF THE ENVELOPES OF MASSIVE STARS , 2016 .

[16]  H. L. Zhang,et al.  Light element opacities from ATOMIC , 2013 .

[17]  C. C. Smith,et al.  Investigation of the opacity of hot, dense aluminum in the region of its K edge , 1988 .

[18]  N. Badnell,et al.  A comparison of Rosseland-mean opacities from OP and OPAL , 2004, astro-ph/0404437.

[19]  W. Szewczuk,et al.  The β Cep/SPB star 12 Lacertae: extended mode identification and complex seismic modelling , 2013, 1304.4049.

[20]  B. H. Armstrong,et al.  Opacity of High-Temperature Air , 1965 .

[21]  M. Seaton,et al.  Opacities for stellar envelopes , 1994 .

[22]  P. Walczak,et al.  Wider pulsation instability regions for β Cephei and SPB stars calculated using new Los Alamos opacities , 2015 .

[23]  Jr.,et al.  A NEW GENERATION OF LOS ALAMOS OPACITY TABLES , 2016, 1601.01005.

[24]  H. L. Zhang,et al.  The Los Alamos suite of relativistic atomic physics codes , 2015 .

[25]  H. L. Zhang,et al.  The new Los Alamos opacity code ATOMIC , 2006 .

[26]  H. L. Zhang,et al.  Model comparisons for high-Z non-LTE steady-state calculations , 2001 .

[27]  J. Guzik,et al.  EXPLORING MASS LOSS, LOW-Z ACCRETION, AND CONVECTIVE OVERSHOOT IN SOLAR MODELS TO MITIGATE THE SOLAR ABUNDANCE PROBLEM , 2010, 1001.0648.

[28]  Iglesias,et al.  Measurements of extreme uv opacities in hot dense Al, Fe, and Ho. , 1996, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[29]  T. S. Perry,et al.  Opacity Measurements in a Hot Dense Medium , 1991, Physical review letters.

[30]  J. Colgan,et al.  An equation of state for partially ionized plasmas: The Coulomb contribution to the free energy , 2015 .

[31]  Stewart,et al.  Spectroscopic absorption measurements of an iron plasma. , 1992, Physical review letters.

[32]  Forrest J. Rogers,et al.  Updated Opal Opacities , 1996 .

[33]  R. Lee.  Plasma line shapes for selected transitions in hydrogen-, helium- and lithium-like ions , 1988 .