Titan aerosol analog absorption features produced from aromatics in the far infrared
Atmospheres, chemistry, Spectroscopy, Titan, atmosphere
We present results on the formation of Titan aerosol analogs produced via far-UV irradiation of five aromatic precursors: benzene, naphthalene, pyridine, quinoline and isoquinoline. This is the first reported evidence of far-IR emission features observed below 200cm-1 in laboratory-created Titan aerosols. These laboratory studies were motivated by recent analyses of Cassini Composite Infrared Spectrometer (CIRS) spectra that show a broad aerosol emission feature in the far-IR spectral region centered near 140cm-1, which is unique to Titan's photochemically-produced aerosol (Anderson, C.M., Samuelson, R.E. . Icarus 212, 762-778). We find that all three of the aerosol analogs formed from nitrogen-containing aromatics have similar broad emission features near that of the observed CIRS far-IR aerosol spectral feature. In addition, the inclusion of 1.5% methane to that of trace amounts of benzene also gives rise to an aerosol with a weak far-IR emission feature located below 200cm-1. © 2014 Elsevier Inc.
Department of Chemistry and Biochemistry
Original Publication Date
DOI of published version
Sebree, Joshua A.; Trainer, Melissa G.; Loeffler, Mark J.; and Anderson, Carrie M., "Titan aerosol analog absorption features produced from aromatics in the far infrared" (2014). Faculty Publications. 1375.