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Title: STEREO OBSERVATIONS OF FAST MAGNETOSONIC WAVES IN THE EXTENDED SOLAR CORONA ASSOCIATED WITH EIT/EUV WAVES

Abstract

We report white-light observations of a fast magnetosonic wave associated with a coronal mass ejection observed by STEREO/SECCHI/COR1 inner coronagraphs on 2011 August 4. The wave front is observed in the form of density compression passing through various coronal regions such as quiet/active corona, coronal holes, and streamers. Together with measured electron densities determined with STEREO COR1 and Extreme UltraViolet Imager (EUVI) data, we use our kinematic measurements of the wave front to calculate coronal magnetic fields and find that the measured speeds are consistent with characteristic fast magnetosonic speeds in the corona. In addition, the wave front turns out to be the upper coronal counterpart of the EIT wave observed by STEREO EUVI traveling against the solar coronal disk; moreover, stationary fronts of the EIT wave are found to be located at the footpoints of deflected streamers and boundaries of coronal holes, after the wave front in the upper solar corona passes through open magnetic field lines in the streamers. Our findings suggest that the observed EIT wave should be in fact a fast magnetosonic shock/wave traveling in the inhomogeneous solar corona, as part of the fast magnetosonic wave propagating in the extended solar corona.

Authors:
; ;  [1];  [2]; ; ;  [3]
  1. Also at Department of Physics, Institute for Astrophysics and Computational Sciences, Catholic University of America, 620 Michigan Avenue, Washington, DC 20064, USA. (United States)
  2. NRC Associate, U.S. Naval Research Laboratory, Washington, DC 20375, USA. (United States)
  3. Also at NASA Goddard Space Flight Center, Solar Physics Laboratory, Code 671, Greenbelt, MD 20771, USA. (United States)
Publication Date:
OSTI Identifier:
22167560
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 766; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPRESSION; DENSITY; ELECTRON DENSITY; EXTREME ULTRAVIOLET RADIATION; MAGNETIC FIELDS; MAGNETOACOUSTIC WAVES; SHOCK WAVES; SOLAR CORONA; VISIBLE RADIATION

Citation Formats

Kwon, Ryun-Young, Ofman, Leon, Kramar, Maxim, Olmedo, Oscar, Davila, Joseph M., Thompson, Barbara J., and Cho, Kyung-Suk, E-mail: ryunyoung.kwon@nasa.gov. STEREO OBSERVATIONS OF FAST MAGNETOSONIC WAVES IN THE EXTENDED SOLAR CORONA ASSOCIATED WITH EIT/EUV WAVES. United States: N. p., 2013. Web. doi:10.1088/0004-637X/766/1/55.
Kwon, Ryun-Young, Ofman, Leon, Kramar, Maxim, Olmedo, Oscar, Davila, Joseph M., Thompson, Barbara J., & Cho, Kyung-Suk, E-mail: ryunyoung.kwon@nasa.gov. STEREO OBSERVATIONS OF FAST MAGNETOSONIC WAVES IN THE EXTENDED SOLAR CORONA ASSOCIATED WITH EIT/EUV WAVES. United States. doi:10.1088/0004-637X/766/1/55.
Kwon, Ryun-Young, Ofman, Leon, Kramar, Maxim, Olmedo, Oscar, Davila, Joseph M., Thompson, Barbara J., and Cho, Kyung-Suk, E-mail: ryunyoung.kwon@nasa.gov. Wed . "STEREO OBSERVATIONS OF FAST MAGNETOSONIC WAVES IN THE EXTENDED SOLAR CORONA ASSOCIATED WITH EIT/EUV WAVES". United States. doi:10.1088/0004-637X/766/1/55.
@article{osti_22167560,
title = {STEREO OBSERVATIONS OF FAST MAGNETOSONIC WAVES IN THE EXTENDED SOLAR CORONA ASSOCIATED WITH EIT/EUV WAVES},
author = {Kwon, Ryun-Young and Ofman, Leon and Kramar, Maxim and Olmedo, Oscar and Davila, Joseph M. and Thompson, Barbara J. and Cho, Kyung-Suk, E-mail: ryunyoung.kwon@nasa.gov},
abstractNote = {We report white-light observations of a fast magnetosonic wave associated with a coronal mass ejection observed by STEREO/SECCHI/COR1 inner coronagraphs on 2011 August 4. The wave front is observed in the form of density compression passing through various coronal regions such as quiet/active corona, coronal holes, and streamers. Together with measured electron densities determined with STEREO COR1 and Extreme UltraViolet Imager (EUVI) data, we use our kinematic measurements of the wave front to calculate coronal magnetic fields and find that the measured speeds are consistent with characteristic fast magnetosonic speeds in the corona. In addition, the wave front turns out to be the upper coronal counterpart of the EIT wave observed by STEREO EUVI traveling against the solar coronal disk; moreover, stationary fronts of the EIT wave are found to be located at the footpoints of deflected streamers and boundaries of coronal holes, after the wave front in the upper solar corona passes through open magnetic field lines in the streamers. Our findings suggest that the observed EIT wave should be in fact a fast magnetosonic shock/wave traveling in the inhomogeneous solar corona, as part of the fast magnetosonic wave propagating in the extended solar corona.},
doi = {10.1088/0004-637X/766/1/55},
journal = {Astrophysical Journal},
number = 1,
volume = 766,
place = {United States},
year = {Wed Mar 20 00:00:00 EDT 2013},
month = {Wed Mar 20 00:00:00 EDT 2013}
}