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

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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

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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

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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

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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

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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

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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

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