2 × 2 real matrices: Difference between revisions

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A '''Lyman-Werner photon''' is an [[ultraviolet]] [[photon]] with an [[energy]] in the range of 11.2 to 13.6 [[electron-volt|eV]], corresponding to the energy range in which the Lyman and Werner absorption bands of molecular [[hydrogen]] (H<math>_2</math>) are found. A photon in this energy range with a frequency that coincides with that of one of the lines in the Lyman or Werner bands can be absorbed by H<math>_2</math>, placing the molecule in an excited electronic state. Radiative decay from this excited state occurs rapidly, with roughly 15% of these decays occurring into the vibrational continuum of the molecule, resulting in its dissociation.<ref>
{{cite journal
| last = Draine | first = Bruce T.
| coauthors = Bertoldi, Frank
| year = 1996
| title = Structure of Stationary Photodissociation Fronts
| journal = Astrophysical Journal
| volume = 468 | pages = 269
| arxiv = astro-ph/9603032
| bibcode = 1996ApJ...468..269D
| doi = 10.1086/177689
}}</ref> This two-step photodissociation process, known as the Solomon process, is one of the main mechanisms by which molecular hydrogen is destroyed in the [[interstellar medium]].
 
==References==
<references />
 
{{DEFAULTSORT:Lyman-Werner photons}}
[[Category:Photons]]
 
 
{{astronomy-stub}}
{{physics-stub}}

Revision as of 15:13, 11 February 2014

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