info:eu-repo/semantics/article
Solar slow magneto-acoustic-gravity waves: an erratum correction and a revisited scenario
Fecha
2020-04Registro en:
Zurbriggen, Ernesto; Sieyra, María Valeria; Costa, Andrea; Esquivel, A.; Stenborg, G.; Solar slow magneto-acoustic-gravity waves: an erratum correction and a revisited scenario; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 494; 4; 4-2020; 5270-5278
0035-8711
CONICET Digital
CONICET
Autor
Zurbriggen, Ernesto
Sieyra, María Valeria
Costa, Andrea
Esquivel, A.
Stenborg, G.
Resumen
Slow waves are commonly observed on the entire solar atmosphere. Assuming a thin flux tube approximation, the cut-off periods of slow-mode magneto-acoustic-gravity waves that travel from the photosphere to the corona were obtained in Costa et al. In that paper, however, a typo in the specific heat coefficient at constant pressure cp value led to an inconsistency in the cut-off calculation, which is only significant at the transition region. Due to the abrupt temperature change in the region, a change of the mean atomic weight (by a factor of approximately 2) also occurs, but is often overlooked in analytical models for simplicity purposes. In this paper, we revisit the calculation of the cut-off periods of magneto-acoustic-gravity waves in Costa et al. by considering an atmosphere in hydrostatic equilibrium with a temperature profile, with the inclusion of the variation of the mean atomic weight and the correction of the inconsistency aforementioned. In addition, we measure the dominant periods near a particular active region (AR 1243) as observed by the Atmospheric Imaging Assembly (AIA) on-board the Solar Dynamic Observatory (SDO) on 2011 July 3 and compare them to our analytical results. The cut-off periods obtained analytically are consistent with the corresponding periods measured in observations.