CH3

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 6.23e-10 3.28e-10
Mathis 4.02e-10 2.35e-10
4000K 2.59e-09 8.58e-14
10000K 7.45e-10 4.48e-11
20000K 6.14e-10 2.66e-10
Lyman-alpha 2.57e-71 8.36e-10
Solar 4.34e-09 3.61e-11
TW-Hya 2.33e-10 5.52e-10
Cosmic ray UV 2.83e-14 3.79e-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 1.73 2.50 0.61 2.25 [Download] [Download]
Mathis 1.73 2.50 0.61 2.25 [Download] [Download]
4000K 1.81 2.59 0.63 2.36 [Download] [Download]
10000K 1.75 2.52 0.62 2.29 [Download] [Download]
20000K 1.73 2.50 0.61 2.25 [Download] [Download]
Lyman-alpha 2.07 2.92 0.00 -31.66 [Download] [Download]
Solar 1.82 2.60 0.63 2.37 [Download] [Download]
TW-Hya 1.74 2.51 0.61 2.27 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.36 3.26 0.50 2.92 [Download] [Download]
Mathis 2.37 3.28 0.50 2.94 [Download] [Download]
4000K 2.09 2.94 0.57 2.66 [Download] [Download]
10000K 2.25 3.14 0.53 2.82 [Download] [Download]
20000K 2.38 3.29 0.49 2.94 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 2.16 3.03 0.55 2.73 [Download] [Download]
TW-Hya 2.14 3.00 0.57 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.]