Carbon Monoxide in the Cassiopaeia: A Supernova Remnant

Rho, J., Jarrett, T. H., Reach, W. T., Gomez, Haley Louise ORCID: https://orcid.org/0000-0003-3398-0052 and Andersen, M. 2009. Carbon Monoxide in the Cassiopaeia: A Supernova Remnant. Astrophysical Journal 693 (1) , L39. 10.1088/0004-637X/693/1/L39

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Abstract

We report the likely detection of near-infrared 2.29 μm first overtone carbon monoxide (CO) emission from the young supernova (SN) remnant Cassiopeia A (Cas A). The continuum-subtracted CO filter map reveals CO knots within the ejecta-rich reverse shock. We compare the first overtone CO emission with that found in the well studied supernova SN 1987A and find ~30 times less CO in Cas A. The presence of CO suggests that molecule mixing is small in the SN ejecta and that astrochemical processes and molecule formation may continue at least ~300 yr after the initial explosion.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	dust, extinction; ISM: molecules; supernova remnants; supernovae: general
Publisher:	IOP Publishing
ISSN:	0004-637X
Last Modified:	19 Oct 2022 09:50
URI:	https://orca.cardiff.ac.uk/id/eprint/22374

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