dc.creator Abel, Martin en_US dc.creator Frommhold, Lothar en_US dc.creator Li, Xiaoping en_US dc.creator Hunt, Katharine L. C. en_US dc.date.accessioned 2011-07-12T17:31:49Z dc.date.available 2011-07-12T17:31:49Z dc.date.issued 2011 en_US dc.identifier 2011-FC-07 en_US dc.identifier.uri http://hdl.handle.net/1811/49460 dc.description Author Institution: Department of Physics, The University of Texas at Austin, Austin, TX 78712; Department of Chemistry, Michigan State University, East Lansing, MI 48824 en_US dc.description.abstract The interaction-induced absorption by collisional pairs of H${_2}$ molecules is an important opacity source in the atmospheres of the outer planets and cool stars . The emission spectra of cool white dwarf stars differ significantly in the infrared from the expected blackbody spectra of their cores, which is largely due to absorption by collisional H${_2}$--H${_2}$, H${_2}$--He, and H${_2}$--H complexes in the stellar atmospheres. Using quantum-chemical methods we compute the atmospheric absorption from hundreds to thousands of kelvin. Laboratory measurements of interaction-induced absorption spectra by H${_2}$ pairs exist only at room temperature and below. We show that our results reproduce these measurements closely, so that our computational data permit reliable modeling of stellar atmosphere opacities even for the higher temperatures. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title COLLISION-INDUCED INFRARED ABSORPTION BY COLLISIONAL COMPLEXES IN DENSE HYDROGEN-HELIUM GAS MIXTURES AT THOUSANDS OF KELVIN en_US dc.type Article en_US
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