Spectral line width decrease in the solar corona: resonant energy conversion from Alfv{é}n to acoustic waves

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dc.creatorZaqarashvili, T. V.
dc.creatorOliver, R.
dc.creatorBallester, J. L.
dc.date2007-03-13
dc.date.accessioned2026-07-07T10:36:55Z
dc.date.available2026-07-07T10:36:55Z
dc.descriptionObservations reveal an increase with height of the line width of several coronal spectral lines probably caused by outwardly propagating Alfv{é}n waves. However, the spectral line width sometimes shows a sudden decrease at a height 0.1-0.2 R, where the ratio of sound to Alfven speeds may approach unity. Qualitative analysis shows that the resonant energy conversion from Alfven to acoustic waves near the region of the corona where the plasma $β$ approaches unity may explain the observed spectral line width reduction.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0703297
dc.identifierhttp://arxiv.org/abs/astro-ph/0703297
dc.identifierAstron.Astrophys.456:L13,2006
dc.identifierdoi:10.1051/0004-6361:20065805
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180214
dc.subjectAstrophysics
dc.titleSpectral line width decrease in the solar corona: resonant energy conversion from Alfv{é}n to acoustic waves
dc.typetext

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