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The UV to Near-IR Optical Properties of PAHs: A Semi-Empirical ModelInterstellar Polycyclic Aromatic Hydrocarbon (PAH) infrared emission features represent an important and unique diagnostic tool of the chemical and physical conditions throughout the universe. However, one challenge facing the widely accepted PAH emission model has been the detection of infrared features in regions of low UV flux. Utilizing recently published laboratory Near Infrared VIR) PAH ion absorption data measured in our laboratory, we build upon previous models for PAH ion absorption in the UV-Vis to extrapolate a new model which incorporates PAH ion absorption in the NIR. This model provides a basis for comparing the relative energy absorption of PAH ions in the UV-Vis and NIR regions for a wide variety of stellar types. This model demonstrates that the radiation from late-type stars can pump the mid-IR PAH features.
Document ID
20050184195
Acquisition Source
Headquarters
Document Type
Preprint (Draft being sent to journal)
Authors
Mattioda, A. L.
(NASA Ames Research Center Moffett Field, CA, United States)
Allamandola, L. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Hudgins, D. M.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Astronomy
Report/Patent Number
Rept-164
Funding Number(s)
OTHER: 399-20-00-05
OTHER: 344-58-3H
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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