Computer Science
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006acspa..65.1154j&link_type=abstract
Spectrochimica Acta, part A, Vol. 65, p. 1154-1179
Computer Science
2
Diffuse Interstellar Bands, Porphyrins, Vibronic Spectra, Shpolskii Matrices
Scientific paper
As a result of the search for the identity of the chromophores responsible for producing the diffuse interstellar bands, a comprehensive exposition of experimental data is presented, which implicates the following molecules:(1) The extremely stable organic molecules, magnesium tetrabenzoporphyrin (MgTBP) and H2TBP. (2) A paraffin matrix(referred to as "grains")containing TBPs. (3) A low concentration of pyridine (also within the grains), whose transmission window at 2175A, accounts for the ubiquitous UV bump. The blue emission spectra associated with the central star HD44179, of the Red Rectangle displays the fluorescence excitation spectra of bare MgTBP. This unique spectrum matches the low temperature lab data of MgTBP in the vapor phase. An effective grain temperature of 2.728K(+/-0.008) was deduced, based on MgTBP's lowest measured vibrational state of 341 GHz.
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