Monthly Notices of the Royal Astronomical Society
Observations of carbon-rich circumstellar envelopes were made using the Phoenix spectrograph on the Gemini South telescope to determine the abundance of small carbon chain molecules. Vibration-rotation lines of the ν3 antisymmetric stretch of C3 near 2040 cm-1 (4.902 μm) have been used to determine the column density for four carbon-rich circumstellar envelopes: CRL 865, CRL 1922, CRL 2023 and IRC +10216. We additionally calculate the column density of C5 for IRC +10216, and provide an upper limit for five more objects. An upper limit estimate for the C7 column density is also provided for IRC+10216. A comparison of these column densities suggests a revision to current circumstellar chemical models may be needed. © 2014 The Authors.
Original Publication Citation
Hargreaves, R. J., Hinkle, K., & Bernath, P. F. (2014). Small carbon chains in circumstellar envelopes. Monthly Notices of the Royal Astronomical Society, 444(4), 3721-3728. doi:10.1093/mnras/stu1719
Hargreaves, R. J.; Hinkle, K.; and Bernath, P. F., "Small Carbon Chains in Circumstellar Envelopes" (2014). Chemistry & Biochemistry Faculty Publications. 71.