The structure of the IC443 surpernova remnant complex derived from ROSAT and GINGA observations

Details The structure of the IC443 surpernova remnant complex derived from ROSAT and GINGA observations The structure of the IC443 surpernova remnant complex derived from ROSAT and GINGA observations

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..277a&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)277-(12)280

Astronomy and Astrophysics

Astronomy

Astronomical Models, Molecular Clouds, Spherical Shells, Supernova Remnants, X Ray Absorption, X Ray Astronomy, Ginga Satellite, Image Analysis, Proportional Counters, Radio Astronomy, Rosat Mission, Sky Surveys (Astronomy), X Ray Imagery, X Ray Spectroscopy

Scientific paper

Radio observations have shown that the emission from IC443 can be attributed to three, partially incomplete shells. The two smaller diameter shells are bright in X-rays, whereas the X-ray extent of the largest one has been discovered only recently in the ROSAT All-Sky-Survey. This new X-ray shell -- G189.6+3.3 -- is well explained by a separate old (approximately 105yr) supernova remnant (SNR), in contrast to the IC443 proper SNR, the age of which has been estimated to approximately 103yr. Spatial structure of the X-ray absorption observed with ROSAT suggests that G189.6+3.3 is located in front of a molecular cloud while the two smaller subshells previously known as IC443 are behind it. This geometry is confirmed by the observation of an additional absorption ridge across IC443, which is produced by a shell of cool and dense matter associated with G189.6+3.3.

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