Physics
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997rcmi.conf..273c&link_type=abstract
The First National Student Conference: NASA University Research Centers at Minority Institutions, p. 273
Physics
Porphyrins, Interstellar Matter, Cosmic Dust, Absorption Spectra, Diffuse Interstellar Bands, Near Infrared Radiation, Negative Ions, Polycyclic Aromatic Hydrocarbons, Polyhedrons, Anions, Carbon, Line Spectra
Scientific paper
Although it has been over sixty years since their discovery, the species responsible for the 127 Diffuse Interstellar Bands (DIBs) from the absorption spectra of reddened stars which lie behind clouds of interstellar dust (which absorbs, scatters, and polarizes radiation) are unknown entities. The bands are termed diffuse because they are broader than the simultaneously observed atomic lines of Na and Ca. These DIBs are in the visible and near IR regions, falling between 4406 and 13175 A. Suggestions have been made that the DIBs carriers may be polycyclic aromatic hydrocarbons, polycarbon chains or or the polyhedron form of carbon, C60, in their neutral, cationic or anionic forms. The DIBs have been divided into families and we focus on the 4428, 5780 and 6284 grouping, because many porphyrin types absorb near these wavelengths.
Cromer Sabrina
Hambright Peter
Mays Quintence
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