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Figure 1: Spectral features in the "late" Ae/Be Herbig star HD 31648. Note the sharp feature in the center of DIB 5780 (it is a stellar Fe II line) and the extremely weak Ca II H line. |
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Figure 2: Features seen in the spectrum of HD 36917. Note the weak emission in Na I (D2). Red-shifting is a common characteristic of DIBs, seen in the spectra of the Orion nebula stars. |
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Figure 3: Spectral features seen in the spectrum of HD 50138. |
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Figure 4: Features seen in the spectrum of HD 179218. The DIB 6284 profiles contain sharp remnants of unremoved telluric lines. |
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Figure 5: Complex spectral features of HD 190073. The central part of DIB 5780 is blended with the Fe II line. The blue shifted double components seen in the Ca II lines were already reported by Merrill (1950). DIB 6284 is contaminated by sharp telluric lines. |
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Figure 6: Broad emission is seen in the atomic lines of HD 250550. Note very weak "narrow" DIBs (6614 and 5797) in contrast to the clear DIB 5780. |
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Figure 7:
The comparison of the general average spectrum of all the
considered stars (except HD 36917) with a spectrum of a well-known ![]() |
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