The nitrogen abundance in NGC 55

Details The nitrogen abundance in NGC 55 The nitrogen abundance in NGC 55

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.117..271a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 117, no. 2, Dec. 1985, p. 271-273.

Astronomy and Astrophysics

Astrophysics

2

Abundance, Nitrogen, Spiral Galaxies, Electron Energy, Emission Spectra, Galactic Radiation, Gas Ionization, Line Spectra

Scientific paper

The purpose of this paper is to propose an interpretation for the line spectrum of NGC 55, whose most remarkable feature is the absence of the generally noticeable λ6584[N II]. From the physical conditions of the ionized gas responsible of the observed emission, the authors infer that the N(N)/N(O) abundance ratio is significantly smaller than usual, probably reflecting a nitrogen underabundance in a medium of temperatures ≡9100K and densities ≡500 cm-3.

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