Differential imaging of forbidden Fe X in IC 443

Details Differential imaging of forbidden Fe X in IC 443 Differential imaging of forbidden Fe X in IC 443

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..852b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 852-861.

Astronomy and Astrophysics

Astrophysics

11

Astronomical Photography, Emission Spectra, Line Spectra, Supernova Remnants, X Ray Sources, Electron Density (Concentration), Gas Pressure, Heao 2, Stellar Coronas

Scientific paper

This paper presents images of two areas of the supernova remnant IC 443 showing emission from the forbidden 6374 A red coronal line taken with an emission-line differential imaging camera. The areas are in the vicinity of strong soft X-ray emission as observed with the Einstein Observatory. The forbidden Fe X emission is patchy on the scale of seconds of arc. For the brightest emission regions, an electron density of approximately 60/cu cm and gas pressures of 0.l7 x 10 to the 8th/cu cm K are found. These estimates are speculative because of the large correction for interstellar dust, and the assumption of sheetlike structure. Although this region has the highest average surface brightness, no direct correlation is found between the X-ray and forbidden Fe X knots. The implied physical conditions in the region suggest that the forbidden Fe X knots are being evaporated.

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