SO

Cross sections

Cross section figure.


[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]
[Photodissociation cross section — separate lines and continuum]
[Photoionisation cross section — separate lines and continuum]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF 4.25e-09 5.31e-10
Mathis 2.85e-09 3.69e-10
4000K 8.44e-09 3.22e-14
10000K 3.03e-09 5.66e-11
20000K 3.68e-09 4.07e-10
Lyman-alpha 1.67e-08 9.41e-17
Solar 1.23e-08 6.56e-12
TW-Hya 1.10e-08 9.77e-11
Cosmic ray UV 5.54e-13 4.54e-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 1.93 2.76 0.57 2.48 [Download] [Download]
Mathis 1.93 2.76 0.57 2.48 [Download] [Download]
4000K 1.73 2.49 0.63 2.26 [Download] [Download]
10000K 1.74 2.52 0.61 2.27 [Download] [Download]
20000K 1.89 2.71 0.57 2.43 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.76 2.53 0.63 2.30 [Download] [Download]
TW-Hya 2.07 2.92 0.57 2.64 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.52 3.46 0.53 3.15 [Download] [Download]
Mathis 2.52 3.46 0.53 3.15 [Download] [Download]
4000K 2.34 3.25 0.55 2.95 [Download] [Download]
10000K 2.47 3.41 0.53 3.09 [Download] [Download]
20000K 2.52 3.47 0.53 3.15 [Download] [Download]
Lyman-alpha 2.15 3.02 0.58 2.75 [Download] [Download]
Solar 2.61 3.56 0.51 3.23 [Download] [Download]
TW-Hya 2.57 3.53 0.52 3.20 [Download] [Download]

[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.]