Search for the 4430 A DIB in the spectra of coronene cation and neutral ovalene
1992; EDP Sciences; Volume: 259; Issue: 1 Linguagem: Inglês
ISSN
1432-0746
AutoresP. Ehrenfreund, L. D’Hendecourt, L. Verstraete, Alain Léger, Werner Schmidt, D. Défourneau,
Tópico(s)Atmospheric Ozone and Climate
ResumoPolycyclic Aromatic Hydrocarbons (PAHs) have been proposed as candidates to explain the Diffuse Interstellar Bands (DIBs). Among the great variety of these species, two seemed of special interest : the coronene cation and neutral ovalene, because solution spectra reported in the literature show that they possess transitions near the strong 4430 A DIB. Laboratory measurements have been performed, using rare gas matrix isolation techniques and UV photolysis to provide a data base with the spectra of these two species and their ions, almost free from environmental shifts and broadening. Bands are found at 4590 A for the coronene cation and 4305 A for neutral ovalene
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