Optical emission from shocks. VI - Abundance gradient in M33 from supernova remnants

Details Optical emission from shocks. VI - Abundance gradient in M33 from supernova remnants Optical emission from shocks. VI - Abundance gradient in M33 from supernova remnants

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..628d&link_type=abstract

Astrophysical Journal, Part 1, vol. 236, Mar. 1, 1980, p. 628-644.

Astronomy and Astrophysics

Astrophysics

70

Abundance, Interstellar Extinction, Interstellar Matter, Nebulae, Spiral Galaxies, Supernova Remnants, Galactic Structure, H Ii Regions, Nuclear Fusion, Optical Emission Spectroscopy, Stellar Mass

Scientific paper

The absolute abundance gradient in the spiral arms of the galaxy M 33 has been obtained using supernova remnants (SNRs) as tracers of gaseous phase abundance in the interstellar medium. No galactic enrichment theory is entirely successful in explaining the observations. The gradient in N/S abundance obtained from SNRs is identical to that given by H II region observations. Nitrogen seems to be produced first as a primary but later (at higher enrichment and star mass to gas mass ratio) as a secondary nucleosynthesis element.

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