Show simple item record Pintér, Balázs Erdélyi, R. Goossens, M. 2008-12-04T16:10:25Z 2008-12-04T16:10:25Z 2007-04
dc.identifier.citation Pintér , B , Erdélyi , R & Goossens , M 2007 , ' Global oscillations in a magnetic solar model : II Oblique propagation ' Astronomy and Astrophysics , vol 466 , no. 1 , pp. 377-388 . DOI: 10.1051/0004-6361:20041632 en
dc.identifier.issn 0004-6361
dc.identifier.other PURE: 90276
dc.identifier.other PURE UUID: 0ec4a0f9-cb61-4758-b955-25ed7ca5c39f
dc.identifier.other dspace: 2160/1376
dc.identifier.other DSpace_20121128.csv: row: 263
dc.identifier.other Scopus: 34347328362
dc.identifier.uri en
dc.description Pintér, B.; Erdélyi, R.; Goossens, M., Global oscillations in a magnetic solar model. II. Oblique propagation, Astronomy and Astrophysics, Volume 466, Issue 1, April IV 2007, pp.377-388 Pintér, B.; Erdélyi, R.; Goossens, M., (2007) 'Global oscillations in a magnetic solar model II. Oblique propagation', Astronomy and Astrophysics 466(1) pp.377-388 RAE2008 en
dc.description.abstract The coupling of solar global acoustic oscillations to a magnetised solar atmosphere is studied here. The solar interior - atmosphere interface is modelled by a non-magnetic polytrope interior overlayed by a planar atmosphere embedded in non-uniform horizontal atmospheric magnetic field. Pintér & Goossens (1999, A&A, 347, 321) showed that parallel propagating acoustic waves can couple resonantly to local magnetohydrodynamic (MHD) slow continuum modes only. In general, global acoustic modes can, however, propagate in arbitrary directions with respect to local atmospheric fields giving rise to an additional efficient coupling mechanism that has consequences on mode damping and atmospheric energetics. In this paper we study obliquely propagating global modes that can couple also to local MHD Alfvén continuum modes. The atmospheric magnetic effects on global mode frequencies are still much of a debate. In particular, the resulting frequency shifts and damping rates of global modes caused by the resonant interaction with both local Alfvén and slow waves are investigated. We found the coupling of global f and p modes and the Lamb mode, that penetrate into the magnetic solar atmosphere, will strongly depend on the direction of propagation with respect to the solar atmospheric magnetic field. These frequency shifts, as a function of the propagation direction, give us a further elegant tool and refinement method of local helioseismology techniques. Finally we briefly discuss the importance of studying obliquely propagating waves and discuss the results in the context of possible helioseismic observations. en
dc.format.extent 12 en
dc.language.iso eng
dc.relation.ispartof Astronomy and Astrophysics en
dc.rights en
dc.title Global oscillations in a magnetic solar model : II Oblique propagation en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.description.version preprint en
dc.description.version preprint en
dc.contributor.institution Department of Physics en
dc.contributor.institution Mathematics and Physics en
dc.description.status Peer reviewed en

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