C3

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 4.97e-09 1.36e-10
Mathis 3.19e-09 1.15e-10
4000K 6.53e-10 9.03e-16
10000K 4.34e-09 9.67e-12
20000K 4.93e-09 1.36e-10
Lyman-alpha 2.17e-09 0.00e+00
Solar 5.85e-10 3.55e-12
TW-Hya 4.17e-09 3.33e-11
Cosmic ray UV 6.88e-13 8.93e-15

[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 1.64 2.39 0.61 2.14 [Download] [Download]
Mathis 1.64 2.39 0.61 2.14 [Download] [Download]
4000K 1.56 2.29 0.63 2.06 [Download] [Download]
10000K 1.61 2.34 0.62 2.10 [Download] [Download]
20000K 1.63 2.38 0.61 2.13 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.59 2.33 0.61 2.08 [Download] [Download]
TW-Hya 1.69 2.46 0.58 2.19 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 3.00 4.03 0.50 3.68 [Download] [Download]
Mathis 3.03 4.07 0.49 3.72 [Download] [Download]
4000K 2.75 3.73 0.51 3.40 [Download] [Download]
10000K 2.96 3.99 0.49 3.64 [Download] [Download]
20000K 3.03 4.07 0.50 3.72 [Download] [Download]
Lyman-alpha - - - -
Solar 3.09 4.14 0.50 3.80 [Download] [Download]
TW-Hya 3.03 4.07 0.50 3.72 [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.]