C4H-

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]
[Photoionisation cross section — separate lines and continuum]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF — 1.93e-09
Mathis — 1.31e-09
4000K — 3.97e-07
10000K — 6.44e-09
20000K — 1.99e-09
Lyman-alpha — 9.77e-10
Solar — 4.95e-07
TW-Hya — 2.52e-09
Cosmic ray UV — 1.09e-13

[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 - - - -
Mathis - - - -
4000K - - - -
10000K - - - -
20000K - - - -
Lyman-alpha - - - -
Solar - - - -
TW-Hya - - - -

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 1.36 2.12 0.56 1.83 [Download] [Download]
Mathis 1.33 2.08 0.56 1.79 [Download] [Download]
4000K 1.07 1.65 0.71 1.47 [Download] [Download]
10000K 1.23 1.90 0.63 1.68 [Download] [Download]
20000K 1.41 2.16 0.57 1.88 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.07 1.64 0.71 1.47 [Download] [Download]
TW-Hya 1.25 1.96 0.58 1.69 [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.]