Abstract
A search has been carried out for the C2- ion in diffuse clouds toward HD 23180, HD 24912, HD 24398, HD 46711, and HD 50064 using the HIDES spectrometer on the Okayama 188-cm telescope. An upper limit of 8.3 × 1010-1.8 × 1012cm-2 was obtained for the C2- column density. The upper limit value (3.8 × 1011 cm-2) toward HD 23180 is two orders of magnitude smaller than that of the C2 radical. Possible production mechanisms for C2- are discussed. © 2005. Astronomical Society of Japan.
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Civiš, S., Hosaki, Y., Kagi, E., Izumiura, H., Yanagisawa, K., Šedivcová, T., & Kawaguchi, K. (2005). Search for C2- in diffuse clouds. Publications of the Astronomical Society of Japan, 57(4), 605–609. https://doi.org/10.1093/pasj/57.4.605
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