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001-es BibID:	BIBFORM114339
035-os BibID:	(WoS)000552323800001 (Scopus)85088963481
Első szerző:	Oxley, William
Cím:	Standing MHD Waves in a Magnetic Slab Embedded in an Asymmetric Magnetic Plasma Environment: Surface Waves / William Oxley, Noémi Kinga Zsámberger, Róbert Erdélyi
Dátum:	2020
ISSN:	1538-4357
Megjegyzések:	Building on a previous study that analyzed standing surface waves in magnetic slabs embedded in a non-magnetic external environment, in this study the model is generalized and external magnetic fields are added. The slab is assumed to be thin, with weak magnetic asymmetry. The frequencies of the standing harmonic modes are derived to leading order in the small quantities representing the thin slab width and the weak asymmetry. It is found that the frequencies are more sensitive to changes to the width of the slab than changes in the magnetic asymmetry. The frequency ratio of the first harmonic to the fundamental mode is derived, along with the amplitude difference between the two sides of the slab, as these may be observable quantities that can be compared with observational results and applied to carry out solar magnetoseismology.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Nap napfizika magnetohidrodinamika MHD protuberancia naplégkör hullámok
Megjelenés:	The Astrophysical Journal. - 898 : 1 (2020), p. 19-31. -
További szerzők:	Zsámberger Noémi Kinga (1991-) (csillagász) Erdélyi Róbert
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM103261
035-os BibID:	(cikkazonosító)109 (WOS)000629751100018 (Scopus)85081623427
Első szerző:	Oxley, William
Cím:	Standing MHD waves in a magnetic slab embedded in an asymmetric plasma environment: slow surface waves / William Oxley, Noémi Kinga Zsámberger, Róbert Erdélyi
Dátum:	2020
ISSN:	1538-4357
Megjegyzések:	The field of solar magnetoseismology ( SMS) is heavily reliant upon our understanding of magnetohydrodynamic (MHD) waves that occur in many solar features. Building on previous studies of propagating MHD waves in a magnetic slab embedded in a nonmagnetic asymmetric environment, in this study we assume a line-tying boundary condition and use analytical techniques to derive the dispersion relation for linear standing MHD oscillations. The slab is first assumed thin, with arbitrary asymmetry, in order to derive the frequencies of the standing harmonic modes for both slow quasi-sausage and slow quasi-kink waves. Besides this, the asymmetry is assumed to be weak in order to determine the frequency dependence on the width of the slab and the asymmetry of the system, to leading order. For both the quasi-sausage and quasi-kink modes, the derived eigenfrequencies show that the dependence on the asymmetry in the system is much weaker than the dependence on the width of the slab. Using the eigenfrequencies, other observable quantities are derived (such as, e.g., the frequency ratio) providing an opportunity to use SMS to infer background diagnostics of the system.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk STRUCTURED ATMOSPHERE OSCILLATIONS PROPAGATION
Megjelenés:	The Astrophysical Journal. - 890 : 2 (2020), p. 1-12. -
További szerzők:	Zsámberger Noémi Kinga (1991-) (csillagász) Erdélyi Róbert
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: