Letter | Published:

Circumstellar methane in the infrared spectrum of IRC+10°216

Abstract

WE reported previously1,2 the detection of lines due to circumstellar CO, C2H2 and HCN in the infrared spectrum of the cool carbon-rich object IRC + 10°216. In this letter we announce the further detection of lines due to circumstellar CH4 in 3.3-µm spectra of this source.

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