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Infrared Spectroscopy and Mapping of IC443

Published online by Cambridge University Press:  12 April 2016

Gillian S. Wright ,
James R. Graham  and
Andrew J. Longmore
Gillian S. Wright
Affiliation:
United Kingdom Infrared Telescope Royal Observatory, Edinburgh
James R. Graham
Affiliation:
Lawrence Berkeley Laboratory, University of California
Andrew J. Longmore
Affiliation:
Royal Observatory, Edinburgh

Abstract

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We present infrared (IR) spectroscopy and imaging of the supernova remnant IC443. [FeII] 1.644µm, Brackett γ and H2 1-0 S(l) were detected. The most striking feature of the spectra is the high [FeII] 1.644µm/Brackett γ ratio, which is typically ~30. We argue that this ratio is due to shock excitation. Two 5’×3’ maps of the remnant in the 1.644µm [FeII] line are used to study the line excitation. The IR [FeII] line is a sensitive probe for regions of shocked gas which is especially useful where the extinction is high, or the shocks are too slow to excite optical lines.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 101: Supernova Remnants and the Interstellar Medium , 1988 , pp. 395 - 398
Copyright
Copyright © Cambridge University Press 1988

References

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