THE FAR-INFRARED SPECTROSCOPY OF VERY LARGE NEUTRAL POLYCYCLIC AROMATIC HYDROCARBONS

Journal Article · Wed Jan 20 04:00:00 EST 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/709/1/42· OSTI ID:21392367

Ricca, Alessandra ^[1]; Bauschlicher, Charles W ^[2]; Mattioda, Andrew L; Boersma, Christiaan

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1. Carl Sagan Center, SETI Institute, 515 N. Whisman Road, Mountain View, CA 94043 (United States)
2. Space Technology Division, Mail Stop 230-3, NASA Ames Research Center, Moffett Field, CA 94035 (United States)

Here we report the computed far-infrared (FIR) spectra of neutral polycyclic aromatic hydrocarbon (PAH) molecules containing at least 82 carbons up to 130 carbons and with shapes going from compact round and oval-type structures to rectangular and to trapezoidal. The effects of size and shape on the FIR band positions and intensities are discussed. Using FIR data from the NASA Ames PAH IR Spectroscopic Database Version 1.1, we generate synthetic spectra that support the suggestion that the 16.4, 17.4, and 17.8 mum bands arise from PAHs.

• OSTI ID: 21392367
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 709; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
AROMATICS
CARBON
ELEMENTS
HYDROCARBONS
INFRARED SPECTRA
NASA
NATIONAL ORGANIZATIONS
NONMETALS
ORGANIC COMPOUNDS
POLYCYCLIC AROMATIC HYDROCARBONS
SPECTRA
SPECTROSCOPY
US ORGANIZATIONS