C2

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 2.35e-10 4.09e-10
Mathis 1.72e-10 3.42e-10
4000K 4.61e-13 1.39e-15
10000K 4.47e-11 2.75e-11
20000K 2.15e-10 4.18e-10
Lyman-alpha 7.83e-11 0.00e+00
Solar 7.41e-12 6.71e-12
TW-Hya 9.22e-11 8.75e-11
Cosmic ray UV 1.83e-14 2.46e-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 2.15 3.04 0.44 2.63 [Download] [Download]
Mathis 2.20 3.09 0.43 2.66 [Download] [Download]
4000K 1.80 2.59 0.60 2.33 [Download] [Download]
10000K 1.92 2.75 0.53 2.44 [Download] [Download]
20000K 2.19 3.08 0.42 2.65 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 2.05 2.91 0.51 2.57 [Download] [Download]
TW-Hya 2.12 2.99 0.51 2.65 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 3.12 4.19 0.52 3.86 [Download] [Download]
Mathis 3.13 4.21 0.51 3.87 [Download] [Download]
4000K 3.07 4.14 0.52 3.81 [Download] [Download]
10000K 3.11 4.18 0.52 3.85 [Download] [Download]
20000K 3.12 4.20 0.51 3.87 [Download] [Download]
Lyman-alpha - - - -
Solar 3.15 4.24 0.51 3.90 [Download] [Download]
TW-Hya 3.13 4.21 0.51 3.88 [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.]