Abstract
We show that a 3 μ extinction feature in galactic infrared sources cannot be due to water-ice grains. Infrared spectra with a resolution of Δλ/λ=0.015 are in remarkably close agreement with the 2.5–4 μ extinction properties calculated for bacterial grains.
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Hoyle, F., Wickramasinghe, C. The identification of the 3μ spectral feature in galactic infrared sources. Astrophys Space Sci 68, 499–503 (1980). https://doi.org/10.1007/BF00639715
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DOI: https://doi.org/10.1007/BF00639715