CH4+
Cross sections
[An explanation of the cross sections in this database]
[All cross sections — variable wavelength scale]
[All cross sections — variable wavelength scale in binary hdf5 format]
[All cross sections — 0.1nm wavelength scale]
[Download cross section figure as pdf]
Photodissociation and ionisation rates (s-1)
| Radiation | Photodissociation | Photoionisation |
|---|---|---|
| ISRF | 2.77e-10 | — |
| Mathis | 1.91e-10 | — |
| 4000K | 1.74e-13 | — |
| 10000K | 4.62e-11 | — |
| 20000K | 2.20e-10 | — |
| Lyman-alpha | 7.87e-12 | — |
| Solar | 3.64e-12 | — |
| TW-Hya | 5.22e-11 | — |
| Cosmic ray UV | 2.68e-14 | — |
[An explanation of the interstellar photo rates.]
[An explanation of the cosmic-ray induced photo rates.]
[An explanation of the radiation fields listed below.]
[Download all rates in a csv file.]
Shielding functions and fitted constants
Photodissociation
| Radiation | γE2 | γexp | k0fit | γfit | Line data | Dust data |
|---|---|---|---|---|---|---|
| ISRF | 2.22 | 3.11 | 0.51 | 2.77 | [Download] | [Download] |
| Mathis | 2.23 | 3.12 | 0.50 | 2.78 | [Download] | [Download] |
| 4000K | 1.99 | 2.82 | 0.59 | 2.55 | [Download] | [Download] |
| 10000K | 2.10 | 2.95 | 0.54 | 2.65 | [Download] | [Download] |
| 20000K | 2.23 | 3.11 | 0.50 | 2.77 | [Download] | [Download] |
| Lyman-alpha | 2.11 | 2.97 | 0.58 | 2.70 | [Download] | [Download] |
| Solar | 2.20 | 3.09 | 0.50 | 2.75 | [Download] | [Download] |
| TW-Hya | 2.20 | 3.08 | 0.51 | 2.74 | [Download] | [Download] |
Photoionisation
| Radiation | γE2 | γexp | k0fit | γfit | Line data | Dust data |
|---|---|---|---|---|---|---|
| ISRF | - | - | - | - | ||
| Mathis | - | - | - | - | ||
| 4000K | - | - | - | - | ||
| 10000K | - | - | - | - | ||
| 20000K | - | - | - | - | ||
| Lyman-alpha | - | - | - | - | ||
| Solar | - | - | - | - | ||
| TW-Hya | - | - | - | - |
[An explanation of the shielding functions and parameterisations.]
[Download all γ factors in a csv file.]
[Download all dust and line shielding functions in a zip file.]