Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Unidentified Infrared Emission Bands

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_5077-4

Definition

The term unidentified infrared emission (UIE) bands refers to a family of emission features observed in a variety of astronomical sources, including the aromatic features at 3.3, 6.2, 7.7, 8.6, and 11.3 μm; aliphatic features at 3.4 and 6.9 μm; and broad emission plateaus at 8, 12, and 17 μm, as well as a host of weaker features that are too broad to be atomic or molecular lines.

History

A family of strong infrared emission bands at 3.3, 6.2, 7.7, 8.6, 11.3, and 12.7 μm were first detected in the young carbon-rich planetary nebula NGC 7027 (Gillett et al. 1973; Russell et al. 1977) (Fig. 1) and in the reflection nebula HD 44179 (Russell et al. 1978). Since the initial discovery, these features are now widely observed in HII regions, reflection nebulae, planetary nebulae, protoplanetary nebulae, and the diffuse interstellar medium of our own and other galaxies.

Keywords

Polycyclic Aromatic Hydrocarbon Emission Feature Central Star Planetary Nebula Young Stellar Object 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References and Further Reading

  1. Bernstein LS, Lynch DK (2009) Small carbonaceous molecules, ethylene oxide (c-C2H4O) and cyclopropenylidene (c-C3H2): sources of the unidentified infrared bands? Astrophys J 704:226–239CrossRefADSGoogle Scholar
  2. Cataldo F, Keheyan Y, Heymann DA (2002) New model for the interpretation of the unidentified infrared bands (UIBS) of the diffuse interstellar medium and of the protoplanetary nebulae. Int J Astrobiol 1:79–86Google Scholar
  3. Chiar JE, Tielens AGGM, Whittet DCB, Schutte WA, Boogert ACA et al (2000) The composition and distribution of dust along the line of sight toward the Galactic Center. Astrophys J 537:749–762CrossRefADSGoogle Scholar
  4. Duley W, Williams DA (1981) The infrared spectrum of interstellar dust: surface functional groups on carbon. Mon Not R Astron Soc 196:269–274CrossRefADSGoogle Scholar
  5. Geballe TR, Tielens AGGM, Kwok S, Hrivnak BJ (1992) Unusual 3 micron emission features in three proto-planetary nebulae. Astrophys J 387:L89–L91CrossRefADSGoogle Scholar
  6. Gillett FC, Forrest WJ, Merrill KM (1973) 8-13-micron spectra of NGC7027, Bd+30°3639 and NGC6572. Astrophys J 183:87–93CrossRefADSGoogle Scholar
  7. Hu A, Duley WW (2008) Spectra of carbon nanoparticles: laboratory simulation of the aromatic CH emission feature at 3.29 μm. Astrophys J 677:L153–L156CrossRefADSGoogle Scholar
  8. Jourdain de Muizon MD’, Hendecourt LB, Geballe TR (1990) Three micron spectroscopy of IRAS sources – observed and laboratory signatures of PAHs. Astron Astrophys 235:367–378ADSGoogle Scholar
  9. Kahanpää J, Mattila K, Lehtinen K, Leinert C, Lemke D (2003) Unidentified infrared bands in the interstellar medium across the Galaxy. Astron Astrophys 405:999–1012CrossRefADSGoogle Scholar
  10. Knacke RF (1977) Carbonaceous compounds in interstellar dust. Nature 269:132–134CrossRefADSGoogle Scholar
  11. Kwok S, Volk K, Bernath P (2001) On the Origin of Infrared Plateau Features in Proto-Planetary Nebulae. Astrophys J 554:L87–L90CrossRefADSGoogle Scholar
  12. Kwok S, Zhang Y (2011) Mixed aromatic-aliphatic organic nanoparticles as carriers of unidentified infrared emission features. Nature 479:80–83CrossRefADSGoogle Scholar
  13. Léger A, Puget JL (1984) Identification of the ‘unidentified’ IR emission features of interstellar dust? Astron Astrophys 137:L5–L8ADSGoogle Scholar
  14. Papoular R, Conrad J, Giuliano M, Kister J, Mille G (1989) A coal model for the carriers of the unidentified IR bands. Astron Astrophys 217:204–208ADSGoogle Scholar
  15. Puetter RC, Russell RW, Willner SP, Soifer BT (1979) Spectrophotometry of compact H II regions from 4 to 8 microns. Astrophys J 228:118–122CrossRefADSGoogle Scholar
  16. Russell RW, Soifer BT, Willner SP (1977) The 4 to 8 micron spectrum of NGC 7027. Astrophys J 217:L149–L153CrossRefADSGoogle Scholar
  17. Russell RW, Soifer BT, Willner SP (1978) The infrared spectra of CRL 618 and HD 44179 /CRL 915. Astrophys J 220:568–572CrossRefADSGoogle Scholar
  18. Sakata A, Wada S, Onaka T, Tokunaga AT (1987) Infrared spectrum of quenched carbonaceous composite (QCC). II – a new identification of the 7.7 and 8.6 micron unidentified infrared emission bands. Astrophys J 320:L63–L67CrossRefADSGoogle Scholar
  19. Uchida KI, Sellgren K, Werner MW, Houdashelt ML (2000) Infrared space observatory mid-infrared spectra of reflection nebulae. Astrophys J 530:817–833CrossRefADSGoogle Scholar
  20. Van Kerckhoven C, Hony S, Peeters E, Tielens A, Allamandola LJ, Hudgins DM, Cox P, Roelfsema PR, Voors RHM, Waelkens C, Waters L, Wesselius PR (2000) The C-C-C bending modes of PAHs: a new emission plateau from 15 to 20 μm. Astron Astrophys 357(3):1013–1019ADSGoogle Scholar
  21. Zhang Y, Kwok S, Hrivnak BJ (2010) A Spitzer/infrared spectrograph spectral study of a sample of galactic carbon-rich proto-planetary nebulae. Astrophys J 725:990–1001CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Faculty of ScienceThe University of Hong KongHong KongChina