.
The resulting scale of temperatures for the reversing layers of the corresponding classes is contained in the table that follows. Successive columns contain the element that is utilized, the spectral class at which its lines attain maximum, and the corresponding temperature derived from the equations of [Chapter VII].
| Element | Maximum | Temperature | Element | Maximum | Temperature |
|---|---|---|---|---|---|
| He+ | 35000° | Ti | 3500° | ||
| Si+++ | 25000 | Mn | 5000 | ||
| Si++ | 18000 | Fe | 5000 | ||
| He | 10000 | V | 3500 | ||
| C+ | 16000 | Cr | 3500 | ||
| Si+ | 11000 | Sr+ | 6000 | ||
| H | 10000 | Ba+ | None | 5500 | |
| [*]Zn | 8000 | Ca | 4500 | ||
| [*]Ca+ | 6000 |
[*] Estimates by Menzel, H. C. 258, 1924.
FOOTNOTES:
[403] Payne, H. C. 256, 263, 1924.
[404] Menzel, H. C. 258, 1924.
[405] Harper and Young, Pub. Dom. Ap. Obs., 3, 3, 1925.
[407] Menzel, H. C. 258, 1924.