Interpretation of helium recombination line observations of the source SGR B2

Details Interpretation of helium recombination line observations of the source SGR B2 Interpretation of helium recombination line observations of the source SGR B2

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....82..203p&link_type=abstract

Astronomy and Astrophysics, vol. 82, no. 1-2, Feb. 1980, p. 203-206.

Astronomy and Astrophysics

Astrophysics

5

Galactic Nuclei, Galactic Structure, Helium, Hydrogen Recombinations, Line Spectra, Abundance, H Ii Regions, Radio Galaxies, Radio Spectra, Spectrum Analysis

Scientific paper

Hydrogen and helium recombination line observations of the galactic center H II region Sgr B2 give an apparent He abundance ranging from less than approximately 0.02 to 0.085 plus or minus 0.015. The observations are explained in the framework of a source model with 'normal' He abundance and where the line transfer is perturbed by collisional broadening. A core-halo model for Sgr B2 gives a reasonable fit to all available single dish observations of line and continuum fluxes.

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