Near-infrared forbidden Fe II emission of M82 supernova remnants - Implications for tracing the supernova content of galaxies

Details Near-infrared forbidden Fe II emission of M82 supernova remnants - Implications for tracing the supernova content of galaxies Near-infrared forbidden Fe II emission of M82 supernova remnants - Implications for tracing the supernova content of galaxies

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...383..164g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 10, 1991, p. 164-173. Research supported by Aerospace Corp. and F

Other

62

Galactic Radiation, H Ii Regions, Infrared Spectra, Irregular Galaxies, Near Infrared Radiation, Supernova Remnants, Astronomical Photometry, Astronomical Spectroscopy, Emission Spectra, Iron, Line Spectra, Spectrophotometry

Scientific paper

Near-infrared forbidden Fe II and Pa-beta spectra of two young SN remnants and one H II region within the central 15 kpc of M82 are reported. Comparison of these spectra reveal a forbidden Fe II/Pa-beta ratio similar to that observed in Galactic SN remnants and H II regions, and show that the forbidden Fe II background emission in M82 has local maxima at the position of the SN remnants observed in the radio continuum. The new observations show that the enhanced infrared forbidden Fe II emission observed in the Galactic SN remnants occurs in remnants spanning a wide range of radio luminosities. It is suggested that the total forbidden Fe II luminosity of galaxies is uncontaminated by emisson due to H II regions, their associated photodissociation regions, and other ionized regions which do not contain shock-processed grains or enriched SN ejecta. It is concluded that infrared forbidden Fe II lines can provide a new relative measure of SN activity in galaxies.

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