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Table A.1.
Cooling rates per free electron Λ. T is temperature in [K], while Zi the atomic number of the i−th ion.
| Process | Species | Λ [erg/s] | Ref. |
|---|---|---|---|
| Bremsstrahlung |
  |
(2) | |
 |
|||
| H I |
 |
(2) | |
| Collisional excitation | He I (11S) |
 |
(2) |
| He II |
 |
(2) | |
| H II |
 |
(1) | |
| Recombination | He II |
 |
(1) |
| He III |
 |
(1) | |
| H I |
 |
(2) | |
| Collisional ionization | He I |
 |
(2) |
| He II |
 |
(1) | |
References. (1) Hui & Gnedin (1997); (2) Glover & Jappsen (2007).
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