abundance index in a sentence

1. Primarily the relative strength of ZrO and TiO bands forms a sequence from MS stars to abundance index 1 through 6.
2. In 1979 Ake defined an " abundance index " based on the ZrO, TiO, and YO band intensities.
3. The new abundance index is not calculated directly, but is assigned from the relative strengths of a number of spectral features.
4. For MS stars and those with abundance index 1 or 2, the same TiO band strength criteria as for M stars can be applied.
5. Spectral types were still listed with explicit Zr and Ti intensity values, and the abundance index was included separately in the list of standard stars.
6. It's difficult to find abundance index in a sentence.
7. Abundance index 0 is not used, and abundance index 10 is equivalent to a carbon star Cx, 2 so it is also never seen.
8. Abundance index 0 is not used, and abundance index 10 is equivalent to a carbon star Cx, 2 so it is also never seen.
9. BBS data is quite difficult to analyze given that the survey does not produce a complete counting of the breeding bird populations but more like a relative abundance index.
10. The ratio of Ba and Sr lines is also useful at the same indices and for carbon-rich stars with abundance index 7 to 9 . Where ZrO and TiO are weak or absent the ratio of the blended features at 645.6 nm and 645.0 nm can be used to assign the temperature class.