Photodissociation Regions

Details Photodissociation Regions Photodissociation Regions

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke2904s&link_type=abstract

"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 2904. Bristol: Institute of Physics Publishing, 2001

Astronomy and Astrophysics

Astrophysics

Interstellar Medium, Interstellar Medium Models And Concepts

Scientific paper

Photodissociation regions, or photon-dominated regions (PDRs), are dense (˜103-107 cm-3) regions in the interstellar medium (ISM) where the hydrogen gas is neutral, and is either atomic or molecular (see H I and H II regions), and where externally incident far-ultraviolet (FUV: 6-13.6 eV) radiation controls the chemical structure and dominates the thermal properties of the gas. This definition e...

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