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Title: SLOW MAGNETOACOUSTIC WAVES OBSERVED ABOVE A QUIET-SUN REGION IN A DARK CAVITY

Abstract

Waves play a crucial role in diagnosing the plasma properties of various structures in the solar corona and coronal heating. Slow magnetoacoustic (MA) waves are one of the important types of magnetohydrodynamic waves. In past decades, numerous slow MA waves were detected above active regions and coronal holes, but were rarely found elsewhere. Here, we investigate a 'tornado'-like structure consisting of quasi-periodic streaks within a dark cavity at about 40-110 Mm above a quiet-Sun region on 2011 September 25. Our analysis reveals that these streaks are actually slow MA wave trains. The properties of these wave trains, including phase speed, compression ratio, and kinetic energy density, are similar to those of the reported slow MA waves, except that the period of these waves is about 50 s, much shorter than the typical reported values (3-5 minutes).

Authors:
; ; ; ; ; ; ; ; ;  [1];  [2]
  1. CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, Anhui 230026 (China)
  2. Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094 (China)
Publication Date:
OSTI Identifier:
22078491
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 758; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPRESSION RATIO; DENSITY; HEATING; KINETIC ENERGY; MAGNETOACOUSTIC WAVES; PERIODICITY; PHASE VELOCITY; PLASMA; SOLAR ACTIVITY; SOLAR CORONA

Citation Formats

Liu Jiajia, Zhou Zhenjun, Wang Yuming, Liu Rui, Liao Chijian, Shen Chenglong, Zheng Huinan, Miao Bin, Su Zhenpeng, Wang, S., and Wang Bin, E-mail: ymwang@ustc.edu.cn, E-mail: ymwang@ustc.edu.cn. SLOW MAGNETOACOUSTIC WAVES OBSERVED ABOVE A QUIET-SUN REGION IN A DARK CAVITY. United States: N. p., 2012. Web. doi:10.1088/2041-8205/758/2/L26.
Liu Jiajia, Zhou Zhenjun, Wang Yuming, Liu Rui, Liao Chijian, Shen Chenglong, Zheng Huinan, Miao Bin, Su Zhenpeng, Wang, S., & Wang Bin, E-mail: ymwang@ustc.edu.cn, E-mail: ymwang@ustc.edu.cn. SLOW MAGNETOACOUSTIC WAVES OBSERVED ABOVE A QUIET-SUN REGION IN A DARK CAVITY. United States. doi:10.1088/2041-8205/758/2/L26.
Liu Jiajia, Zhou Zhenjun, Wang Yuming, Liu Rui, Liao Chijian, Shen Chenglong, Zheng Huinan, Miao Bin, Su Zhenpeng, Wang, S., and Wang Bin, E-mail: ymwang@ustc.edu.cn, E-mail: ymwang@ustc.edu.cn. Sat . "SLOW MAGNETOACOUSTIC WAVES OBSERVED ABOVE A QUIET-SUN REGION IN A DARK CAVITY". United States. doi:10.1088/2041-8205/758/2/L26.
@article{osti_22078491,
title = {SLOW MAGNETOACOUSTIC WAVES OBSERVED ABOVE A QUIET-SUN REGION IN A DARK CAVITY},
author = {Liu Jiajia and Zhou Zhenjun and Wang Yuming and Liu Rui and Liao Chijian and Shen Chenglong and Zheng Huinan and Miao Bin and Su Zhenpeng and Wang, S. and Wang Bin, E-mail: ymwang@ustc.edu.cn, E-mail: ymwang@ustc.edu.cn},
abstractNote = {Waves play a crucial role in diagnosing the plasma properties of various structures in the solar corona and coronal heating. Slow magnetoacoustic (MA) waves are one of the important types of magnetohydrodynamic waves. In past decades, numerous slow MA waves were detected above active regions and coronal holes, but were rarely found elsewhere. Here, we investigate a 'tornado'-like structure consisting of quasi-periodic streaks within a dark cavity at about 40-110 Mm above a quiet-Sun region on 2011 September 25. Our analysis reveals that these streaks are actually slow MA wave trains. The properties of these wave trains, including phase speed, compression ratio, and kinetic energy density, are similar to those of the reported slow MA waves, except that the period of these waves is about 50 s, much shorter than the typical reported values (3-5 minutes).},
doi = {10.1088/2041-8205/758/2/L26},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 758,
place = {United States},
year = {2012},
month = {10}
}