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Carbon monoxide in the cold debris of Supernova 1987a

Kamenetzky, J., McCray, R., Indebetouw, R., Barlow, M. J., Matsuura, Mikako ORCID:, Baes, M., Blommaert, J. A. D. L., Bolatto, A., Decin, L., Dunne, L., Fransson, C., Glenn, J., Gomez, Haley Louise ORCID:, Groenewegen, M. A. T., Hopwood, R., Kirshner, R. P., Lakicevic, M., Marcaide, J., Marti-Vidal, I., Meixner, M., Royer, P., Soderberg, A., Sonneborn, G., Staveley-Smith, L., Swinyard, B. M., Van de Steene, G., van Hoof, P. A. M., van Loon, J. Th., Yates, J. and Zanardo, G. 2013. Carbon monoxide in the cold debris of Supernova 1987a. The Astrophysical Journal 773 (2) , L34. 10.1088/2041-8205/773/2/L34

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We report spectroscopic and imaging observations of rotational transitions of cold CO and SiO in the ejecta of SN1987A, the first such emission detected in a supernova remnant. In addition to line luminosities for the CO J = 1-0, 2-1, 6-5, and 7-6 transitions, we present upper limits for all other transitions up to J = 13-12, collectively measured from the Atacama Large Millimeter Array, the Atacama Pathfinder EXperiment, and the Herschel Spectral and Photometric Imaging REceiver. Simple models show the lines are emitted from at least 0.01 M ☉ of CO at a temperature >14 K, confined within at most 35% of a spherical volume expanding at ~2000 km s–1. Moreover, we locate the emission within 1'' of the central debris. These observations, along with a partial observation of SiO, confirm the presence of cold molecular gas within supernova remnants and provide insight into the physical conditions and chemical processes in the ejecta. Furthermore, we demonstrate the powerful new window into supernova ejecta offered by submillimeter observations.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: ISM: supernova remnants; supernovae: individual (SN1987A)
Publisher: Institute of Physics
ISSN: 2041-8205
Last Modified: 24 Oct 2022 12:00

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