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TIMOTHY W. SCHMIDT, NEIL J. REILLY, SCOTT H. KABLE, School of Chemistry, University of Sydney, NSW 2006, Australia; ROBERT G. SHARP, Anglo-Australian Observatory, PO Box 296 Epping, NSW 1710, Australia.
We report high resolution (R~37000) Integral Field spectroscopy of the central region (r<14 arcsec) of the Red Rectangle nebula surrounding HD 44179. The observations focus on the 5800 Å emission feature, the bluest of the Red Rectangle Bands. We propose that the emission feature, widely believed to be a molecular emission band, is sequence structure emission from a molecule with an extended chromophore. We present model spectra for a range of PAH cations with elevated vibrational temperatures.