Abstract
The hump in the ultraviolet part of the interstellar extinction curve is interpreted as a broad diffuse absorption band. Its equivalent width is estimated for 36 stars by means of OAO-2 data. The equivalent widths are correlated with the following parameters: colour excessE(B-V), colour excessE(B − V), depth of the band δm max, equivalent widths of the diffuse bands at 5780 and 6284 Å, and the column density of neutral hydrogenN HI. The physical parameters half-width and oscillator strength of the band at 2175 Å are estimated.
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Dorschner, J., Friedemann, C. & Gürtler, J. The ultraviolet absorption band at 2175 Å: Correlations with other interstellar features. Astrophys Space Sci 46, 357–369 (1977). https://doi.org/10.1007/BF00644383
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DOI: https://doi.org/10.1007/BF00644383