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Title: ACCURATE RITZ WAVELENGTHS OF PARITY-FORBIDDEN [Co II] AND [V II] LINES OF ASTROPHYSICAL INTEREST

We report a comprehensive list of accurate Ritz wavelengths for parity-forbidden [Co II] and [V II] lines obtained from the analysis of energy levels measured in the laboratory with Fourier transform emission spectroscopy. Such lines, particularly those in the infrared, are in demand for the analysis of low-density astrophysical plasmas in and around objects such as planetary nebulae, star-forming regions, and active galactic nuclei. Transitions between all known metastable levels of Co II and V II are included in our analysis, producing wavelengths for 1477 [V II] lines and 782 [Co II] lines. Of these, 170 [V II] lines and 171 [Co II] lines arise from transitions with calculated transition probabilities greater than 1 Multiplication-Sign 10{sup -2} s{sup -1} and upper level excitations of less than 5 eV, and thus are likely to be observed in astrophysical spectra.
Authors:
;  [1]
  1. Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ (United Kingdom)
Publication Date:
OSTI Identifier:
22140325
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, Supplement Series; Journal Volume: 207; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COBALT; DEMAND; DENSITY; EMISSION SPECTROSCOPY; ENERGY LEVELS; EV RANGE; EXCITATION; FOURIER TRANSFORM SPECTROMETERS; GALAXY NUCLEI; PARITY; PLANETARY NEBULAE; PLASMA; PROBABILITY; SPECTRA; STARS; VANADIUM; WAVELENGTHS