Excess nitrogen abundance in the interstellar gas of the NGC 6946 nucleus

Details Excess nitrogen abundance in the interstellar gas of the NGC 6946 nucleus Excess nitrogen abundance in the interstellar gas of the NGC 6946 nucleus

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978crasb.286..339a&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie B - Sciences Physiques, vol. 286, no. 23, June 12, 1978, p. 339-342. In Fr

Astronomy and Astrophysics

Astronomy

Abundance, Astronomical Spectroscopy, Galactic Nuclei, Interstellar Gas, Nitrogen, Spiral Galaxies, Astronomical Photometry, Electron Density (Concentration), Electron Energy, H Alpha Line, Stellar Mass

Scientific paper

A spectrographic study of the nuclear regions of the spiral galaxy NGC 6946 is presented. The electron density is found to be approximately 1000/cu cm, which is similar to the electron densities found in the nuclear regions of similar galaxies. A lower limit for the nitrogen abundance in the emitted gas is calculated from the relative intensities of the H alpha, (N II) and (S II) lines. Spectrographic data indicate that the electron temperature is approximately 5000 K and is less then 10,000 K. The corresponding lower limit for nitrogen abundance calculated as the ratio of nitrogen to hydrogen is 0.000058.

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