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Photoelectric heating of interstellar gas.

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dc.contributor.author Robertson, Douglas Edward.
dc.date.accessioned 2012-06-27T20:33:52Z
dc.date.available 2012-06-27T20:33:52Z
dc.date.created 1995 en_US
dc.date.issued 2012-06-27
dc.identifier.uri http://hdl.handle.net/123456789/1621
dc.description 81 leaves en_US
dc.description.abstract The emission of photoelectrons from interstellar dust grains is thought to be the dominant mechanism by which stellar radiant energy is transferred to interstellar gas. The purpose of this theoretical research is to refine previous models of photoelectric heating. The photoelectric emission rate is calculated for interstellar graphitic grains in a typical interstellar ultraviolet radiation field. The effect of the surface potential and photoelectron energy distribution is included. The free electron capture rate is calculated for several interstellar gas conditions as a function of temperature, electron density and grain charge. From the charge balance between photoemission and electron capture the grain charge distribution is obtained. The net heating rate is then calculated for appropriate grain sizes and a Mathis-Rurnpl-Nordsieck size distribution of grams. en_US
dc.language.iso en_US en_US
dc.subject Astrophysics. en_US
dc.subject Interstellar matter. en_US
dc.subject Photoemission. en_US
dc.title Photoelectric heating of interstellar gas. en_US
dc.type Thesis en_US
dc.college las en_US
dc.advisor Jorge Ballester en_US
dc.department physical sciences en_US

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