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Title:
Structure and kinematics of dense gas associated with the supernova remnant IC 443
Authors:
Dickman, R. L.; Snell, Ronald L.; Ziurys, L. M.; Huang, Yi-Long
Affiliation:
AA(Five College Radio Astronomy Observatory, Amherst, MA; NSF, Div. of Astronomical Sciences, Washington), AB(Five College Radio Astronomy Observatory; Massachusetts Univ., Amherst), AC(Five College Radio Astronomy Observatory; Massachusetts Univ., Amherst; Arizona State Univ., Tempe, AZ), AD(Five College Radio Astronomy Observatory; Massachusetts Univ., Amherst; National Tsing Hua Univ., Hsinchu, Taiwan)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 400, no. 1, p. 203-213. (ApJ Homepage)
Publication Date:
11/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CARBON MONOXIDE, INTERSTELLAR MATTER, KINEMATICS, MOLECULAR GASES, SUPERNOVA REMNANTS, DYNAMICS, GAS DENSITY, RADIO TELESCOPES
DOI:
10.1086/171987
Bibliographic Code:
1992ApJ...400..203D

Abstract

Results of systematic high-resolution J = 1 yields 0 CO and HCO(+) mapping observations of IC 443 carried out with the FCRAO 14-m radio telescope are presented. Five new clumps of perturbed molecular gas are identified and their relationship to one another clarified. Together with three previously known perturbed regions, the clumps outline a roughly elliptical ring whose major axis is about 9 pc across. There is a systematic variation in the distribution of the high-velocity molecular gas associated with the clumps, which suggests that the clumps are distributed along the periphery of a tilted, expanded ring. High-resolution 1.3-mm CO maps of several clumps were also made. The most prominent clump in the SNR possesses a velocity field with a strong systematic component, which is interpreted as an indication that some of the high-velocity gas is ablated clump material accelerated at a shock interface between the clump and hot, outflowing gas within the supernova cavity. It is concluded that the shocked gas associated with ICC 443 represents preexisting molecular cloud material now interacting with the SNR.

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