J/PAZh/30/946ivo://CDS.VizieR/J/PAZh/30/946CDSSimonia I.A.2005-05-05T17:34:42Z2005-05-05T17:34:01ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frcometsspectroscopyWe discuss the possible nature of unidentified cometary emission lines. We propose a model of the ice particles in cometary halos as a mixture of frozen polycyclic aromatic hydrocarbons (PAHs) and acyclic hydrocarbons. We describe the general properties of frozen hydrocarbon particles (FHPs) and suggest interpreting some of the unidentified cometary emission lines as the photoluminescence of FHPs. We compare the position of quasi-lines in the spectrum of Comet 122P/de Vico with the position of quasi-lines in the photoluminescence spectrum of PAHs that were dissolved in acyclic hydrocarbons at a temperature of 77K and that constituted a polycrystalline solution. We estimated the detectability of FHP photoluminescence in cometary spectra.2004PAZh...30..946Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PAZh/30/946CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PAZh/30/946https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PAZh/30/946http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PAZh/30/946https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PAZh/30/946https://vizier.iucaa.in/viz-bin/votable?-source=J/PAZh/30/946http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PAZh/30/946GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/PAZh/30/946/tableLuminescence of cometary frozen hydrocarbon particles: Results of our comparative analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSeqSequential number of the PAHintPAHPAH name and formulaSolventSolvent designation (1)charLambdaPAHSpectral line wavelength of luminescent emissions of polycrystalline solutionsnmfloatLambdaSpectral line wavelength of unidentified cometary band0.1nmfloat