NASA NTRS · 19750016512
Dust in the galactic center
Abstract
The strength of the 9.7 microns absorption band in the radiation from the galactic center is used to deduce a range of measures of the visual extinction from 20 to 400 magnitudes. A possible way of arriving at a unique value of the visual extinction consistent with variations in the wavelength dependence of extinction as a function of grain characteristics is indicated. The mass of silicates deduced from the 9.7 microns band appears to imply a gradient of metallicity towards the galactic center.
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Greenberg, J. M., Seung, S. H.. 1974-11-01. Dust in the galactic center. https://ntrs.nasa.gov/citations/19750016512
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