Wave propagation in sunspots

dc.contributor.author	Hasan, S. S
dc.date.accessioned	2008-09-11T16:17:39Z
dc.date.available	2008-09-11T16:17:39Z
dc.date.issued	1990
dc.identifier.citation	IAU Symposium, No. 142, pp. 189 - 191	en
dc.identifier.issn	0074-1809
dc.identifier.uri	http://hdl.handle.net/2248/3557
dc.description.abstract	Wave 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.iso	en	en
dc.publisher	International Astronomical Union	en
dc.relation.uri	http://adsabs.harvard.edu/abs/1990IAUS..142..189H	en
dc.subject	Solar atmosphere	en
dc.subject	Sunspots	en
dc.subject	Umbras	en
dc.subject	Wave propagation	en
dc.subject	Photosphere	en
dc.subject	Rayleigh-Ritz method	en
dc.subject	Variational principles	en
dc.title	Wave propagation in sunspots	en
dc.type	Article	en