Carbon monoxide in supernova 1987A

Details Carbon monoxide in supernova 1987A Carbon monoxide in supernova 1987A

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.334..327s&link_type=abstract

Nature (ISSN 0028-0836), vol. 334, July 28, 1988, p. 327-329.

Statistics

61

Carbon Monoxide, Infrared Spectra, Supernova 1987A, Boltzmann Distribution, Stellar Spectra

Scientific paper

The identification of carbon monoxide in the infrared spectra of SN1987A, which exploded on February 23, 1987, represents the first-ever detection of a molecule in a supernova. In the IR spectra obtained, first-overtone emission from CO was observed near 2.3 microns as early as day 112 after the explosion, and was clearly detectable in all subsequent spectra. Spectra of the CO fundamental at 4.6 microns support this identification. The CO is suggested to form part of the supernova ejecta, and a preliminary analysis of the first overtone band is presented using Boltzmann population statistics. The model reproduces well the spectra obtained on days 192 and 255 and implies the presence of about 0.00005 solar masses of CO by day 255. By day 284 the fit is less good, owing to increasingly prominent emission from other species, possibly in combination with the breakdown of the Boltzmann distribution.

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