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Monthly Archives: May 2016
Photoionization of Co+ and electron-impact excitation of Co2+ using the Dirac R-matrix method
N. B. Tyndall, C. A. Ramsbottom, C. P. Ballance, A. Hibbert School of Mathematics & Physics, The Queen’s University of Belfast, Belfast, BT7 1NN, Northern Ireland Modelling of massive stars and supernovae (SNe) plays a crucial role in understanding galaxies. … Continue reading
Line broadening and the solar opacity problem
Krief, M., Feigel, A.; Gazit, D. The Racah Institute of Physics, The Hebrew University, 91904 Jerusalem, Israel The calculation of line widths constitutes theoretical and computational challenges in the calculation of opacities of hot dense plasmas. Opacity models use line broadening … Continue reading
Posted in Atomic data applications, Atomic data production
Tagged K lines, line widths, solar opacities
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Solar Opacity Calculations Using the Super-transition-array Method
Krief, M.; Feigel. A.; Gazit, D. The Racah Institute of Physics, The Hebrew University, 91904 Jerusalem, Israel A new opacity model based on the Super-Transition-Array (STA) method for the calculation of monochromatic opacities of local thermodynamic equilibrium plasmas, was developed. … Continue reading
Atomic Processes for Astrophysical Plasmas
Badnell N.R., Del Zanna G., Fernandez-Menchero L., Giunta A., Liang G.Y., Mason, H.E., and Storey, P.J. In this review we summarize the recent calculations and improvements of atomic data that we have carried out for the analysis of astrophysical spectroscopy within … Continue reading
Posted in Atomic data production
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Collision strengths and transition probabilities for Co III forbidden lines
Storey, P. J. and Sochi, Taha AA(Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK t.sochi@ucl.ac.uk), AB(Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK) In this paper we compute … Continue reading
Posted in Atomic data production
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Excitation and charge transfer in low-energy hydrogen-atom collisions with neutral atoms: Theory, comparisons, and application to Ca
Barklem, P.S. Theoretical Astrophysics, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden A theoretical method is presented for the estimation of cross sections and rates for excitation and charge-transfer processes in low-energy hydrogen-atom collisions with … Continue reading
Posted in Atomic data production
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Partition functions and equilibrium constants for diatomic molecules and atoms of astrophysical interest
Barklem, P.S. and Collet, R. AA(Theoretical Astrophysics, Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden Paul.Barklem@physics.uu.se), AB(Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT, 2611, Australia; Stellar Astrophysics Centre, Department of Physics … Continue reading
Posted in Atomic data production
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Reboot!
AstroAtom has been inactive for some time, but we are making an effort to get things moving again. We invite contributions of papers, meetings and anything else of interest (jobs, prizes, codes, etc). These may be submitted via the submit form … Continue reading
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