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Title:
ISOCAM spectro-imaging of the H_2 rotational lines hfill in the supernova remnant IC 443
Authors:
Cesarsky, D.; Cox, P.; Pineau des Forêts, G.; van Dishoeck, E. F.; Boulanger, F.; Wright, C. M.
Affiliation:
AA( Institut d'Astrophysique Spatiale, Bât. 120, Université de Paris XI, F-91405 CEDEX Orsay, France), AB( Institut d'Astrophysique Spatiale, Bât. 120, Université de Paris XI, F-91405 CEDEX Orsay, France), AC(DAEC, Observatoire de Paris, F-92195 Meudon Principal CEDEX, France), AD(Leiden Observatory, P.O. Box 9513, 2300 RA Leiden, The Netherlands), AE( Institut d'Astrophysique Spatiale, Bât. 120, Université de Paris XI, F-91405 CEDEX Orsay, France), AF(School of Physics, University College, ADFA, UNSW, Canberra ACT 2600, Australia)
Publication:
Astronomy and Astrophysics, v.348, p.945-949 (1999) (A&A Homepage)
Publication Date:
08/1999
Origin:
A&A
A&A Keywords:
ISM: INDIVIDUAL OBJECTS: IC 443, ISM: SUPERNOVA REMNANTS, INFRARED: ISM: LINES AND BANDS, SHOCK WAVES
Bibliographic Code:
1999A&A...348..945C

Abstract

We report spectro-imaging observations of the bright western ridge of the supernova remnant IC {443 obtained with the ISOCAM circular variable filter (CVF) on board the Infrared Space Observatory (ISO). This ridge corresponds to a location where the interaction between the blast wave of the supernova and ambient molecular gas is amongst the strongest. The CVF data show that the 5 to 14 mu m spectrum is dominated by the pure rotational lines of molecular hydrogen (v = 0-0, S(2) to S(8) transitions). At all positions along the ridge, the H_2 rotational lines are very strong with typical line fluxes of 10(-4} to 10({-3)) erg s(-1) cm(-2) sr(-1). We compare the data to a new time-dependent shock model; the rotational line fluxes in IC {443 are reproduced within factors of 2 for evolutionary times between 1,000 and 2,000 years with a shock velocity of sim 30 km s(-1) and a pre-shock density of sim 10(4 cm(-3)) . Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA.

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