Tag Archives: atomic data

Energy levels and transition rates for helium-like ions with Z=10-36

R. Si (1,2,3), X.L. Guo (2,3), K. Wang (4), S. Li (5), J. Yan (5,6,7), C.Y. Chen (2,3), T. Brage (1), Y.M. Zou (2,3)   (1) Division of Mathematical Physics, Department of Physics, Lund University, Box 118, SE-221 00 Lund, … Continue reading

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The CHIANTI database, a consistency check on the accuracy of the stored cross-section values in He I to O I isoelectronic sequence ions

U Feldman Artep, Inc., Ellicott City, MD 21042, USA (ufeldman@verizon.net) CHIANTI is an atomic database with software for calculating emission properties. It is extensively used in deriving the atomic properties of spectra recorded from astrophysical and low density laboratory plasmas. … Continue reading

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Collision strengths for nebular [O III] optical and infrared lines

Storey, P. J. (1); Sochi, Taha (1); Badnell, N. R. (2) (1) Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK; (2) Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK. We present electron collision strengths and their thermally … Continue reading

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Atomic data for S II – Toward Better Diagnostics of Chemical Evolution in High-redshift Galaxies

Romas Kisielius (1), Varsha P. Kulkarni (2), Gary J. Ferland (3), Pavel Bogdanovich (1), Matt L. Lykins (3) (1) Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, LT-01108, Lithuania,  (2) Department of Physics and Astronomy, University of … Continue reading

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Energy levels, radiative rates and electron impact excitation rates for transitions in Si II

KM Aggarwal, FP Keenan Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, Northern Ireland, UK. Energies for the lowest 56 levels, belonging to the 3s^23p, 3s3p^2, 3p^3, 3s^23d, 3s3p3d, 3s^24l and 3s^25l configurations of … Continue reading

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Energy levels, radiative rates and electron impact excitation rates for transitions in Al X

Aggarwal, Kanti M.; Keenan, Francis P. Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, Northern Ireland, UK. Energy levels, radiative rates and lifetimes are calculated among the lowest 98 levels of the n ≤ 4 configurations of Be-like … Continue reading

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Physical properties of the interstellar medium using high-resolution Chandra spectra: O K-edge absorption

E. Gatuzz (1), J. García (2), C. Mendoza (1,3), T. R. Kallman (4), M. A. Bautista (3), T. W. Gorczyca (3) (1) Centro de Física, Instituto Venezolano de Investigaciones Científicas (IVIC), PO Box 20632, Caracas 1020A, Venezuela, (2) Harvard-Smithsonian Center … Continue reading

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