Theoretical He I line intensities in low-density plasmas

Astronomy and Astrophysics – Astronomy

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Astronomical Models, Helium, Line Spectra, Nebulae, Plasma Density, Plasma Spectra, Electron Density (Concentration), Infrared Spectroscopy

Scientific paper

The recombination spectra of He I in nebular conditions can be calculated by means of a capture-collision-cascade model based on Brocklehurst's (1972) method when the calculations of the 2(3)P-2(3)S series are corrected. Results are discussed for calculations which include temperatures from 312.5-20,000 K and electron densities of up to 10 to the 6th/cu cm. Line emissions from He I in the optical and IR bands can be interpreted by means of the calculations of recombination spectra.

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