Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Zurbriggen, E. [1] ; Sieyra, V, M. ; Costa, A. [2] ; Esquivel, A. [2, 3] ; Stenborg, G. [4]
Total Authors: 5
[1] Univ Presbiteriana Mackenzie, Escola Engn, Ctr Radio Astron & Astrofis Mackenzie CRAAM, Rua Consolacao 896, BR-01302907 Sao Paulo, SP - Brazil
[2] Consejo Nacl Invest Cient & Tecn, Inst Astron Teor & Expt IATE, Laprida 854, RA-5000 Cordoba - Argentina
[3] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, A Postal 70-543, Ciudad De Mexico 04510 - Mexico
[4] US Naval Res Lab, Space Sci Div, Washington, DC 20375 - USA
Total Affiliations: 4
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 494, n. 4, p. 5270-5278, JUN 2020.
Web of Science Citations: 0

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. (AU)

FAPESP's process: 18/25177-4 - Supra-arcade downflows modelling through its signature at radio and microwaves
Grantee:Ernesto Zurbriggen
Support type: Scholarships in Brazil - Post-Doctorate