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(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

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Author(s):
Zurbriggen, E. [1] ; Sieyra, V, M. ; Costa, A. [2] ; Esquivel, A. [2, 3] ; Stenborg, G. [4]
Total Authors: 5
Affiliation:
[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
Abstract

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 Opportunities: Scholarships in Brazil - Post-Doctoral