The nature of the filaments northeast of the supernova remnant IC 443

Details The nature of the filaments northeast of the supernova remnant IC 443 The nature of the filaments northeast of the supernova remnant IC 443

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...281..658f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 281, June 15, 1984, p. 658-664.

Other

51

Astronomical Spectroscopy, Filaments, Nebulae, Supernova Remnants, Emission Spectra, H Ii Regions, Line Spectra, Optical Measurement, Shock Wave Propagation, Spectrophotometry

Scientific paper

New optical spectrophotometry of the faint filaments northeast of the bright supernova remnant IC 443 show emission-line ratios very similar to those seen in the bright filaments of IC 443 and other supernova remnants. This suggests that these northeastern filaments also represent shock-heated interstellar gas and are not simply the southern boundary of the neighboring H II region S249 as previously suspected. If these filaments are associated with IC 443, they then reveal a much more extended remnant structure than previously assumed and permit a relatively accurate determination of IC 443's distance via its interaction with S249.

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