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Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3557
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dc.contributor.authorHasan, S. S-
dc.date.accessioned2008-09-11T16:17:39Z-
dc.date.available2008-09-11T16:17:39Z-
dc.date.issued1990-
dc.identifier.citationIAU Symposium, No. 142, pp. 189 - 191en
dc.identifier.issn0074-1809-
dc.identifier.urihttp://hdl.handle.net/2248/3557-
dc.description.abstractWave propagation in sunspot umbrae is analyzed; the stratification in a typical umbra is approximated by a model atmosphere, extending vertically from a depth of a few thousand kilometers below the photosphere, to the transition region. A Rayleigh-Ritz variational technique is used to calculate the normal mode frequencies of the umbra for different values of the horizontal wave number. The nature of the wave modes is examined by decomposing the eigenvectors into longitudinal and transverse components.en
dc.language.isoenen
dc.publisherInternational Astronomical Unionen
dc.relation.urihttp://adsabs.harvard.edu/abs/1990IAUS..142..189Hen
dc.subjectSolar atmosphereen
dc.subjectSunspotsen
dc.subjectUmbrasen
dc.subjectWave propagationen
dc.subjectPhotosphereen
dc.subjectRayleigh-Ritz methoden
dc.subjectVariational principlesen
dc.titleWave propagation in sunspotsen
dc.typeArticleen
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