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Fig. 4

image

Same three recorded spectra as in Fig. 3, in the geocentric frame, in the region of the 9632 Å DIB. A vertical offset has been applied to each spectrum for clarity. The HD 37022 spectrum exhibits a clear double absorption, as first observed by Galazutdinov et al. (2017), here delineated by two Gaussian profiles (thick black dashed line). The expected center of the 9632 Å DIB, based on the 9577 Å absorption, or the Na II or K I lines, is shown by a red dot-dot-dashed line and corresponds very well to the center of the blue-ward absorption. The center of the second absorption is shown by a red dotted line. If this absorption is stellar, the corresponding stellar lines of the two other targets should be centered at the black (HD 54662) and blue (HD 79186) dotted line locations, using the result of Fig. 3. In both cases these fall in the middle of a broad absorption, suggesting that all three absorptions maybe stellar.

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