Il Nuovo Cimento C

, Volume 15, Issue 6, pp 1077–1083 | Cite as

Laboratory measurements on molecules of astrophysical interest

  • V. Mennella
  • E. Bussoletti
  • L. Colangeli
  • G. M. Piacentino
Article
  • 15 Downloads

Summary

The infra-red absorption bands of a representative polycyclic aromatic hydrocarbon (PAH) molecule, coronene, have been examined in the laboratory at various temperatures up to 240 °C. This paper is devoted to a systematic analysis of the temperature variations of the integrated band intensity. A tentative interpretation of the observed behaviour is given in terms of anharmonicity effects. These new laboratory results may be helpful in the context of the attribution of the «unidentified» infra-red band to PAH molecules. In addition, for the first time thermal-emission spectra of three different PAHs recorded at 240 °C are presented.

PACS

98.90 Other topics on stellar systems galactic and extragalactic objects and systems 

PACS

98.40.Bs Interstellar dust 

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Copyright information

© Società Italiana di Fisica 1992

Authors and Affiliations

  • V. Mennella
    • 1
  • E. Bussoletti
    • 2
  • L. Colangeli
    • 3
  • G. M. Piacentino
    • 3
  1. 1.Osservatario Astronomico di CapodimonteNapoliItalia
  2. 2.Istituto Universitario NavaleNapoliItalia
  3. 3.Dipartimento Ingegneria IndustrialeUniversità di CassinoCassinoItalia

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