CO formation in the metal-rich ejecta of SN 1987A

Details CO formation in the metal-rich ejecta of SN 1987A CO formation in the metal-rich ejecta of SN 1987A

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342..406p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 342, July 1, 1989, p. 406-415.

Astronomy and Astrophysics

Astronomy

39

Carbon Monoxide, Infrared Astronomy, Metallicity, Stellar Models, Supernova Remnants, Supernova 1987A, Emission Spectra, Fine Structure, Infrared Spectra, Stellar Spectra, Vibrational Spectra

Scientific paper

A model for the formation of CO in the expanding ejecta of SN 1987A suggests that the 4.6-micron and 2.3 micron emissions noted in the SN spectrum may originate from the inner metal-rich regions of the ejecta. Also reported are the assignment of a 2.26-micron excess feature in the high-resolution IR spectra to the v = 2 to 0 overtone of CO(+) and the possible identification of a 2.95-micron feature with the v = 2 to 0 transition of electronically excited CO. The results suggest that the regions in which CO formation takes place must be ionized to a substantially lower degree than regions which dominate the line emission of heavier metals.

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