Supernova 1987 A - A cold, dusty and rusty supernova

Details Supernova 1987 A - A cold, dusty and rusty supernova Supernova 1987 A - A cold, dusty and rusty supernova

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..671s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 15, 1992, p. 671-679.

Astronomy and Astrophysics

Astronomy

21

Cosmic Dust, Iron, Metal Ions, Stellar Mass Ejection, Stellar Temperature, Supernova 1987A, Electron Density (Concentration), Forbidden Bands, Infrared Spectra, Near Infrared Radiation, Temperature Distribution

Scientific paper

The near-infrared emission from forbidden lines of singly ionized iron in the ejecta of supernova 1987 A has been modeled. It is found that as late as 1989 February, relatively high excitation transitions such as those arising from the a4F-a2G multiplet at 7150 A are surprisingly strong. The inferred temperature and electron density imply a mass of Fe(+) of order 10 exp -3 solar mass. No evidence is found for strong emission by neutral or doubly ionized iron. Given that 0.07 solar mass of iron is believed to be present in the ejecta of SN 1987 A, the results suggest that the bulk of the iron is unable to emit in the wavelength range investigated.

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