multiplets, do not appear in the solar spectrum. None of the above lines is strong enough to be seen in the spectra of the stars.
IONIZED YTTRIUM
Four of the multiplets attributed to ionized yttrium[334] are satisfactorily identified in the solar spectrum. The wave-lengths and identifications are contained in [Table XVI], p. 83. The arrangement is as in [Table XI].
[TABLE XVI]
| Series | Wave-Lenght | Int. | Attribution | Int. | Wave-Lenght |
|---|---|---|---|---|---|
| * | 3710.30 | 100 | Y | 3 | 3710.431 |
| 3832.87 | 20 | 3833.026 | |||
| * | 3774.33 | 50 | Y | 3 | 3774.473 |
| 3878.27 | 4 | 1 | 3878.334 | ||
| 3818.37 | 10 | Y | 1 | 3818.487 | |
| * | 3788.69 | 30 | 2 | 3788.839 | |
| 3600.72 | 50 | Y | 3 | 3600.880 | |
| 3548.99 | 20 | Y? | 2 | 3549.151 | |
| 3664.59 | 20 | Y | 2 | 3664.760 | |
| 3611.05 | 30 | Y, Mg? | 2 | 3611.189 | |
| 3584.51 | 10 | Y | 2 | 3584.660 | |
| 3628.70 | 10 | Y, Mg? | 2 | 3628.847 | |
| 3601.91 | 20 | Y | 1 | 3602.060 | |
| 4309.61 | 20 | 1 | 4309.792 | ||
| 4235.71 | 6 | 0 | 4235.894 | ||
| 4199.283 | 3 | 00 | 4199.434 | ||
| 4398.03 | 15 | In zircon [*] | 1 | 4398.178 | |
| 4358.72 | 8 | Y-Zr | 0 | 4358.879 | |
| 4422.60 | 10 | Fe, Y | 3 | 4422.741 | |
| 5087.42 | 10 | Y? | 1 | 5087.601 | |
| 4982.12 | 3 | 000 | 4982.319 | ||
| 5320.77 | 1 | - | - | ||
| 5205.71 | 10 | Y | 0 | 5205.897 | |
| 5119.10 | 3 | 00 | 5119.292 | ||
| 5289.81 | 2 | 000 | 5289.988 | ||
| 5200.41 | 8 | V | 0 | 5200.590 |
[*] But not Zr.
ZIRCONIUM (40)
The ultimate lines of the zirconium atom[335] are all found in the solar spectrum, far into the ultra-violet.
The bands in the spectra of stars of Class