S2

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 6.56e-10 1.28e-10
Mathis 3.74e-10 9.25e-11
4000K 1.98e-07 6.46e-14
10000K 4.27e-09 1.76e-11
20000K 6.66e-10 1.06e-10
Lyman-alpha 0.00e+00 2.83e-10
Solar 2.07e-07 1.33e-11
TW-Hya 1.01e-09 1.98e-10
Cosmic ray UV 8.85e-15 1.40e-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 1.28 1.90 0.70 1.73 [Download] [Download]
Mathis 1.28 1.90 0.70 1.72 [Download] [Download]
4000K 1.25 1.87 0.70 1.70 [Download] [Download]
10000K 1.28 1.90 0.70 1.72 [Download] [Download]
20000K 1.28 1.91 0.70 1.73 [Download] [Download]
Lyman-alpha - - - -
Solar 1.25 1.87 0.71 1.70 [Download] [Download]
TW-Hya 1.27 1.89 0.70 1.72 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.36 3.27 0.48 2.90 [Download] [Download]
Mathis 2.38 3.29 0.48 2.92 [Download] [Download]
4000K 1.84 2.65 0.57 2.37 [Download] [Download]
10000K 2.19 3.06 0.51 2.73 [Download] [Download]
20000K 2.38 3.29 0.47 2.92 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 2.19 3.06 0.53 2.75 [Download] [Download]
TW-Hya 2.15 3.01 0.56 2.72 [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.]