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Earth, Planets and Space
Fig. 2. | Earth, Planets and Space

Fig. 2.

From: Toward understanding the 3.4 μm and 9.7 μm extinction feature variations from the local diffuse interstellar medium to the Galactic center

Fig. 2.

Schematic illustration of obtaining ΔCext(9.7μm), the excess 9.7μm extinction cross section above the continuum. It is obtained by (1) fitting the 9.7μm model profile with a Drude function and subtracting the continuum which is fitted with a six-order polynomial, (2) integrating the continuum-subtracted extinction profile (which is approximated by a Drude function) over wavelength, and finally (3) dividing the integrated value with the width of the interstellar 9.7μm silicate absorption feature.

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