Some new results on shock chemistry in IC 443
Journal Article
·
· Astrophys. J., Lett. Ed.; (United States)
We have made new observations of CO, /sup 13/CO, SiO, SO, H/sub 2/CO, HCO/sup +/, N/sub 2/H/sup +/, CS, OCS, HCN, and OH in the shocked clouds of IC 443. At position IC 443 B, we find (a) the shocked CO is optically thin, (b) the HCO/sup +//CO abundance ratio is 4--9 x 10/sup -4/, a tenfold enhancement over normal interstellar clouds, (c) HCN/CO = 1--3 x 10/sup -4/ and CS/CO = 2--3 x 10/sup -4/, consistent with abundances found in ordinary clouds, (d) no enhancements of SO or SiO as occur in Orion KL, (e) optically thin preshock OH, confirming a hundredfold enhancement of OH/CO in the shock, and (f) an OH main line anomaly, with T/sub ex/(1667)>T/sub ex/(1665) in the shocked region.
- Research Organization:
- Cornell University
- OSTI ID:
- 6294892
- Journal Information:
- Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 246:1; ISSN AJLEA
- Country of Publication:
- United States
- Language:
- English
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