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 1.26e-09
Mathis 8.09e-10 9.40e-10
4000K 3.42e-08 1.11e-13
10000K 2.82e-09 1.37e-10
20000K 1.38e-09 1.07e-09
Lyman-alpha 1.27e-09 3.18e-11
Solar 4.95e-08 3.00e-11
TW-Hya 1.54e-09 2.89e-10
Cosmic ray UV 1.07e-13 1.00e-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 1.64 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 2.52 3.46 0.49 3.10 [Download] [Download]
Mathis 2.54 3.48 0.48 3.12 [Download] [Download]
4000K 2.27 3.16 0.56 2.88 [Download] [Download]
10000K 2.42 3.34 0.51 3.01 [Download] [Download]
20000K 2.56 3.50 0.48 3.13 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 2.75 3.70 0.42 3.26 [Download] [Download]
TW-Hya 2.55 3.48 0.46 3.10 [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.]