Two-Photon Absorption by Hydrogen Molecules: Origin of the 2175 Angstrom Astronomical Band?

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dc.creatorSorokin, Peter P.
dc.creatorGlownia, James H.
dc.date2006-08-03
dc.date.accessioned2026-07-07T07:19:17Z
dc.date.available2026-07-07T07:19:17Z
dc.descriptionThe near UV spectra of OB stars in our galaxy are often dominated by a very broad extinction band peaking at ~2175 Angstroms. Forty years after its discovery, the origin of this band remains unknown, although interstellar dust particles are generally assumed to be the carriers. Here we report that two-photon absorption by hydrogen molecules in gaseous clouds enveloping OB stars can lead to a band peaking at ~2175 Angstroms. We present astronomical spectral evidence supporting our proposal that this nonlinear absorption mechanism accounts for the lambda2175 feature.
dc.description32 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0608092
dc.identifierhttp://arxiv.org/abs/astro-ph/0608092
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/114572
dc.subjectAstrophysics
dc.titleTwo-Photon Absorption by Hydrogen Molecules: Origin of the 2175 Angstrom Astronomical Band?
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