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CO formation in the metal-rich ejecta of SN 1987A (1989)

Allen, J. E., Jr. ; Nuth, J. A., III ; Petuchowski, S. J. ; [et al.]

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Publication Date: 2011-08-19

Description: 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.

Keywords: ASTROPHYSICS

Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 342; 406-415

Format: text

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