SH

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 1.23e-09 5.02e-11
Mathis 8.09e-10 3.71e-11
4000K 3.42e-08 5.30e-16
10000K 2.82e-09 3.86e-12
20000K 1.38e-09 4.50e-11
Lyman-alpha 1.27e-09 0.00e+00
Solar 4.95e-08 8.86e-13
TW-Hya 1.54e-09 1.10e-11
Cosmic ray UV 1.07e-13 3.36e-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 2.40 0.60 2.15 [Download] [Download]
Mathis 1.63 2.39 0.60 2.13 [Download] [Download]
4000K 1.15 1.81 0.63 1.58 [Download] [Download]
10000K 1.56 2.33 0.60 2.08 [Download] [Download]
20000K 1.65 2.40 0.61 2.16 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.16 1.82 0.62 1.58 [Download] [Download]
TW-Hya 1.70 2.52 0.54 2.21 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.90 3.92 0.50 3.57 [Download] [Download]
Mathis 2.92 3.93 0.50 3.58 [Download] [Download]
4000K 2.67 3.65 0.51 3.31 [Download] [Download]
10000K 2.87 3.87 0.50 3.52 [Download] [Download]
20000K 2.93 3.95 0.50 3.60 [Download] [Download]
Lyman-alpha - - - -
Solar 2.96 3.99 0.51 3.65 [Download] [Download]
TW-Hya 2.93 3.96 0.50 3.61 [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.]