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Modeling the Unidentified Infrared Emission with Combinations of Polycyclic Aromatic Hydrocarbons
Open accessAbstract
The infrared emission band spectrum associated with many different interstellar objects can be modeled successfully by using combined laboratory spectra of neutral and positively charged polycyclic aromatic hydrocarbons (PAHs). These model spectra, shown here for the first time, alleviate the principal spectroscopic criticisms previously leveled at the PAH hypothesis and demonstrate that mixtures of free molecular PAHs can indeed account for the overall appearance of the widespread interstellar infrared emission spectrum. Furthermore, these models give us insight into the structures, stabilities, abundances, and ionization balance of the interstellar PAH population. These, in turn, reflect conditions in the emission zones and shed light on the microscopic processes involved in the carbon nucleation, growth, and evolution in circumstellar shells and the interstellar medium.
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Cited by
Smith, J. D. T., Draine, B. T., Dale, D. A., Moustakas, J., Kennicutt, Jr., Helou, G., Armus, L., Roussel, H., Sheth, K., Bendo, G. J., et al. (2007) · The Astrophysical Journal · doi:10.1086/510549 · Cited by 962
Hudgins, D. M., Bauschlicher, Jr., & Allamandola, L. J. (2005) · The Astrophysical Journal · doi:10.1086/432495 · Cited by 313
Self-citationISM properties in low-metallicity environments: I. Mid-infrared spectra of dwarf galaxies
Madden, S. C., Galliano, F., Jones, A. P., & Sauvage, M. (2006) · Astronomy & Astrophysics · doi:10.1051/0004-6361:20053890 · Cited by 303
Carbon molecules in space: from astrochemistry to astrobiology
Ehrenfreund, P., & Sephton, M. A. (2006) · Faraday Discussions · doi:10.1039/b517676j · Cited by 114
Metadata
- Authors
- Allamandola, L. J., Hudgins, D. M., & Sandford, S. A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1999-02-01
- Volume
- 511
- Issue
- 2
- Pages
- L115-L119
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W2097527096
- Cited by
- 452
- References
- 0
- FWCI
- 15.72
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Allamandola, L. J., Hudgins, D. M., & Sandford, S. A. (1999). Modeling the Unidentified Infrared Emission with Combinations of Polycyclic Aromatic Hydrocarbons. The Astrophysical Journal. https://doi.org/10.1086/311843
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