H2

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 5.68e-11 0.00e+00
Mathis 4.60e-11 0.00e+00
4000K 2.02e-16 0.00e+00
10000K 3.86e-12 0.00e+00
20000K 5.77e-11 0.00e+00
Lyman-alpha 0.00e+00 0.00e+00
Solar 3.08e-12 4.88e-13
TW-Hya 1.68e-11 3.21e-12
Cosmic ray UV

[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 3.11 4.18 0.51 3.85 [Download] [Download]
Mathis 3.12 4.20 0.51 3.86 [Download] [Download]
4000K 3.06 4.12 0.52 3.79 [Download] [Download]
10000K 3.10 4.18 0.52 3.85 [Download] [Download]
20000K 3.12 4.20 0.51 3.86 [Download] [Download]
Lyman-alpha - - - -
Solar 3.27 4.37 0.49 4.02 [Download] [Download]
TW-Hya 3.20 4.29 0.50 3.94 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF - - - -
Mathis - - - -
4000K - - - -
10000K - - - -
20000K - - - -
Lyman-alpha - - - -
Solar 3.54 4.70 0.48 4.33 [Download] [Download]
TW-Hya 3.59 4.75 0.48 4.38 [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.]