Solar slow magneto-acoustic-gravity waves: An erratum correction and a revisited scenario

Zurbriggen E.; Sieyra M.V.; Costa A.; Esquivel A.; Stenborg G.

Solar slow magneto-acoustic-gravity waves: An erratum correction and a revisited scenario

Tipo

Artigo

Data de publicação

2020

Periódico

Monthly Notices of the Royal Astronomical Society

Citações (Scopus)

3

Autores

Zurbriggen E.
Sieyra M.V.
Costa A.
Esquivel A.
Stenborg G.

Resumo

© 2020 The Author(s).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.

Assuntos Scopus

Atomic weights , Constant pressures , Flux tubes , Magneto-acoustic-gravity waves , Methods:analytical , Slow mode , Slow wave , Solar atmosphere , Specific heat coefficients , Sun: atmosphere