l-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]
[Photodissociation cross section — separate lines and continuum]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF 3.66e-09
Mathis 2.34e-09
4000K 7.45e-10
10000K 3.30e-09
20000K 3.66e-09
Lyman-alpha 7.87e-12
Solar 6.75e-10
TW-Hya 1.23e-09
Cosmic ray UV 6.08e-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 1.62 2.36 0.62 2.12 [Download] [Download]
Mathis 1.62 2.36 0.62 2.12 [Download] [Download]
4000K 1.59 2.31 0.64 2.09 [Download] [Download]
10000K 1.59 2.32 0.62 2.08 [Download] [Download]
20000K 1.61 2.35 0.62 2.11 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.59 2.32 0.64 2.09 [Download] [Download]
TW-Hya 1.60 2.34 0.62 2.10 [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.]