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Table 2

Index definitions used in this work.

Bandpass (Å)
Index blue central red

Na Ia 21 910−21 966 22 040−22 107 22 125−22 170
Ca Ia 22 450−22 560 22 577−22 692 22 700−22 720
Fe Iab 22 133−22 176 22 251−22 332 22 465−22 560
Fe Ibb 22 133−22 176 22 369−22 435 22 465−22 560
Mg Ib 22 715−22 755 22 790−22 850 22 850−22 874
D CO c 22 872−22 925 22 930−22 983
22 710−22 770

Reference. Definitions by , and

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