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Advances in Observing Various Coronal EUV Waves in the SDO Era and Their Seismological Applications (Invited Review)

  • Solar Cycle 24 as seen by SDO
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Abstract

Global extreme-ultraviolet (EUV) waves are spectacular traveling disturbances in the solar corona associated with energetic eruptions such as coronal mass ejections (CMEs) and flares. Over the past 15 years, observations from three generations of space-borne EUV telescopes have shaped our understanding of this phenomenon and at the same time led to controversy about its physical nature. Since its launch in 2010, the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) has observed more than 210 global EUV waves in exquisite detail, thanks to its high spatio–temporal resolution and full-disk, wide-temperature coverage. A combination of statistical analysis of this large sample, more than 30 detailed case studies, and data-driven MHD modeling, has been leading their physical interpretations to a convergence, favoring a bimodal composition of an outer, fast-mode magnetosonic wave component and an inner, non-wave CME component. Adding to this multifaceted picture, AIA has also discovered new EUV wave and wave-like phenomena associated with various eruptions, including quasi-periodic fast propagating (QFP) wave trains, magnetic Kelvin–Helmholtz instabilities (KHI) in the corona and associated nonlinear waves, and a variety of mini-EUV waves. Seismological applications using such waves are now being actively pursued, especially for the global corona. We review such advances in EUV wave research focusing on recent SDO/AIA observations, their seismological applications, related data-analysis techniques, and numerical and analytical models.

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Notes

  1. A similar metric radio source associated with a Moreton–EIT wave was reported by Vršnak et al. (2005) and alternatively interpreted as optically thin gyrosynchrotron emission.

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Acknowledgements

This work is supported by the NASA Living With a Star (LWS) Program (grant NNX11AO68G). Additional support to LO was provided by NASA grant NNX12AB34G. Special thanks go to Barbara Thompson for inviting both authors to the 2013 LWS SDO Science Workshop that led to this topical issue and this review. We are grateful to the anonymous referee for constructive comments and suggestions that helped improve this article. WL thanks Nariaki Nitta, Cooper Downs, Barbara Thompson, Angelos Vourlidas, Peng-Fei Chen, Spiros Patsourakos, and Kyoung-Sun Lee for critical comments on the manuscript and/or fruitful discussions. We thank Suli Ma, Alexander Warmuth, Nariaki Nitta, Ding Yuan, Ute Möstl (now Ute Amerstorfer), Nat Gopalswamy, Jason Byrne, and David Pascoe for providing the original figures, and especially Cooper Downs, Liheng Yang, Ting Li, Eoin Carley, and Ryun-Young Kwon for customizing their figures to fit the layout of this article. Figures 1c and 1d, 2, 3, 4 (right), 5, 6a, 6c, and 6i, 8, 9, 11 (middle and right), 12a, 13, 14, 15a – 15c, and 16 (left and middle) are reproduced by permission of the AAS. Figures 4 (left), 11 (left), 15 (right), and 16 (right) are reproduced with permission from Astronomy & Astrophysics, © ESO.

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Authors and Affiliations

  1. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, 94305, USA

    Wei Liu

  2. Lockheed Martin Solar and Astrophysics Laboratory, Bldg. 252, 3251 Hanover Street, Palo Alto, CA, 94304, USA

    Wei Liu

  3. Catholic University of America and NASA Goddard Space Flight Center, Code 671, Greenbelt, MD, 20771, USA

    Leon Ofman

  4. Department of Geophysics and Planetary Sciences, Tel Aviv University, Tel Aviv, 69978, Israel

    Leon Ofman

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  1. Wei Liu
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  2. Leon Ofman
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Correspondence to Wei Liu.

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The Many Scales of Solar Activity in Solar Cycle 24 as seen by SDO

Guest Editors: Aaron Birch, Mark Cheung, Andrew Jones, and W. Dean Pesnell

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Liu, W., Ofman, L. Advances in Observing Various Coronal EUV Waves in the SDO Era and Their Seismological Applications (Invited Review). Sol Phys 289, 3233–3277 (2014). https://doi.org/10.1007/s11207-014-0528-4

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  • DOI: https://doi.org/10.1007/s11207-014-0528-4

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