Tag Archives: recombination

Improved He I Emissivities in the Case B Approximation

R.L. Porter (1), G.J. Ferland (2), P.J. Storey (3), M.J. Detisch (2) ((1)Department of Physics and Astronomy and Center for Simulational Physics, University of Georgia, Athens, GA 30602, USA;(2)Dept. of Physics & Astronomy, University of Kentucky, Lexington, KY 40506, USA; … Continue reading

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Very deep spectroscopy of planetary nebula NGC 7009 – The rich optical recombination spectrum and new effective recombination coefficients

Xuan Fang  (Department of Astronomy, School of Physics, Peking University, China) New ab-initio calculations of the effective recombination coefficients for the N II and O II recombination spectrum were carried out in the intermediate coupling scheme by Fang, Storey & … Continue reading

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Understanding hydrogen recombination line observations with ALMA and EVLA

Thomas Peters (1,2,3), Steven N. Longmore (4) and Cornelis P. Dullemond (1) ((1) Zentrum für Astronomie der Universität Heidelberg, Institut für Theoretische Astrophysik, Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany; (2) Fellow of the Baden-Württemberg Stiftung; (3) Institut für Theoretische Physik, Universität … Continue reading

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QED model of the radiation escape from the matter

T. Zalialiutdinov (1), D. Solovyev (1) and L. Labzowsky (1,2) ((1) V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504, St. Petersburg, Russia; (2) Petersburg Nuclear Physics Institute, 188300, Gatchina, St. Petersburg, Russia) A simple … Continue reading

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QED theory of the multiphoton cascade transitions in atoms

L. Labzowsky (1,2), D. Solovyev (1) and T. Zalialiutdinov (1) ((1) V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya, St. Petersburg, Russia (2) Petersburg Nuclear Physics Institute, 188300, Gatchina, St. Petersburg, Russia) QED theory of multiphoton … Continue reading

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New effective recombination coefficients for nebular N II lines

Fang, X. (Peking University, China), Storey, P.J. (University College London, UK) and Liu, X.-W. (Peking University, China) Aims: In nebular astrophysics, there has been a long-standing dichotomy in plasma diagnostics between abundance determinations using the traditional method based on collisionally … Continue reading

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