On observing C60+ and C602+ in laboratory and space
Karlsruhe Institute of Technology, Institute of Physical Chemistry II, 76131 Karlsruhe, Germany
Received: 24 August 2015
Accepted: 18 October 2015
Recently, we have measured the IR absorptions of C60+, C60−, and C602+ in neon matrixes. Many previously unknown absorptions were established. Here we compare our laboratory IR absorption spectra for C60+ and C602+ to the IR emission spectra of several astronomical objects that show C60 emission. We find that IR bands of C60+ are possibly present in the objects Tc1, SMP SMC 16, NGC 7023, NGC 2244, and SMP LMC 02. Infrared emission features possibly due to C602+ were identified in NGC 7023. To help with future observations of fullerene-related DIBs, we also revisited the oscillator strengths of the NIR absorptions of C60+, and report significantly revised values. Additionally, we report the UV oscillator strengths of C60+.
Key words: astrochemistry / molecular data / line: identification / methods: laboratory: molecular / planetary nebulae: general / infrared: planetary systems
© ESO, 2015