The 15-20 μm Spitzer Spectra of Interstellar Emission Features in NGC 7023

@inproceedings{Sellgren2007The1,
  title={The 15-20 μm Spitzer Spectra of Interstellar Emission Features in NGC 7023},
  author={Kristen Sellgren and Keven Isao Uchida and Michael W. Werner},
  year={2007}
}
Wepresent15Y20 � mlong-slitspectraof NGC7023fromtheInfraredSpectrograph(IRS)onSpitzer. Weobserve recently discovered interstellar emission features at 15.9, 16.4, 17.0, 17.4, 17.8, and 18.9 � m, throughout the reflection nebula. The 16.4 � m emission feature peaks near the photodissociation front northwest of the star, as the aromatic emission features (AEFs) at 3.3, 6.2, and 11.3 � m do. The 16.4 � m emission feature is thus likely related to the AEFs and radiates by nonequilibrium emission… CONTINUE READING

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