CH2+

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]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF 1.41e-10 —
Mathis 1.16e-10 —
4000K 3.74e-11 —
10000K 8.33e-11 —
20000K 1.55e-10 —
Lyman-alpha 7.87e-12 —
Solar 3.43e-11 —
TW-Hya 4.66e-11 —
Cosmic ray UV 8.88e-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 1.86 2.73 0.40 2.27 [Download] [Download]
Mathis 1.93 2.83 0.37 2.33 [Download] [Download]
4000K 1.50 2.20 0.64 1.98 [Download] [Download]
10000K 1.53 2.26 0.61 2.01 [Download] [Download]
20000K 1.83 2.70 0.40 2.24 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.52 2.23 0.62 1.99 [Download] [Download]
TW-Hya 1.71 2.53 0.47 2.15 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF - - - -
Mathis - - - -
4000K - - - -
10000K - - - -
20000K - - - -
Lyman-alpha - - - -
Solar - - - -
TW-Hya - - - -

[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.]