Measurement of L-shell transitions in M-shell ions in the laboratory and identification in stellar coronae

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:408

Article; Proceedings Paper

Lepson, J. K.¹  Beiersdorfer, P.²  Hell, N.^2,3,4  Brown, G. V.²  Trabert, E.²  Bode, M. P.¹ 

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] Lawrence Livermore Natl Lab, Phys Div, Livermore, CA 94550 USA

[3] Univ Erlangen Nurnberg, Dr Karl Remeis Sternwarte, Sternwartstr 7, D-96049 Bamberg, Germany

[4] Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Sternwartstr 7, D-96049 Bamberg, Germany

关键词: Spectra;    Extreme ultraviolet;    Laboratory;    Stars;   

DOI  :  10.1016/j.nimb.2017.03.152

来源: Elsevier

【 摘 要 】

Based on laboratory data from the Lawrence Livermore EBIT-I electron beam ion trap and calculations using the relativistic multi-reference Moller-Plesset (MRMP) perturbation theory approach, we identify L-shell transitions of M-shell iron ions in emission spectra of the nearby stars Capella and Procyon. These lines are weaker than the well known, prominent lines from Fe XVII. However, they need to be taken into account when modeling the spectra, especially of cool stars. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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