Intensity ratios of Brackett to Balmer lines of hydrogen in gaseous nebulae

Details Intensity ratios of Brackett to Balmer lines of hydrogen in gaseous nebulae Intensity ratios of Brackett to Balmer lines of hydrogen in gaseous nebulae

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.180p..57g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 180, Aug. 1977, p. 57P-59P. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

57

Astronomical Spectroscopy, Balmer Series, H Lines, Hydrogen Recombinations, Nebulae, Spectrum Analysis, Electron Energy, Emissivity

Scientific paper

Case B of Baker and Menzel (1938) is considered, and theoretical results are given for intensity ratios of the Brackett series in hydrogen recombination spectra. Intensity ratios of Brackett to Balmer lines are tabulated for upper-level quantum numbers of 5(1)10, 15, and 20, electron temperatures of 5000, 10,000, and 20,000 K, electron densities of 0, 100, 10,000, and 1 million per cu cm, and the limit where electron density tends to infinity. An expression for calculating the absolute value of the emissivity is also provided.

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