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In this paper, we present the observations of two successive fast-mode extreme ultraviolet (EUV) wave events observed on 2016 July 23. Both fast-mode waves were observed by the Atmospheric Imaging Assembly (AIA) instrument on board the…

太阳与恒星天体物理 · 物理学 2018-08-22 R. Chandra , P. F. Chen , R. Joshi , B. Joshi , B. Schmieder

We present an investigation of the Extreme-Ultraviolet (EUV) wave linked to the flare that occurred on 28 October 2021, along with the associated coronal loop oscillation and type II radio burst. The EUV wave was observed by multi-viewpoint…

太阳与恒星天体物理 · 物理学 2025-07-03 Pooja Devi , Ramesh Chandra , Arun Kumar Awasthi , Brigitte Schmieder , Reetika Joshi

Shock waves are excited by coronal mass ejections (CMEs) and large-scale extreme-ultraviolet (EUV) wave fronts and can result in low-frequency radio emission under certain coronal conditions. In this work, we investigate a moving source of…

太阳与恒星天体物理 · 物理学 2024-04-10 J. Rigney , P. T. Gallagher , G. Ramsay , J. G. Doyle , D. M. Long , O. Stepanyuk , K. Kozarev

We present observations of the diffraction, refraction, and reflection of a global extreme-ultraviolet (EUV) wave propagating in the solar corona. These intriguing phenomena are observed when the wave interacts with two remote active…

太阳与恒星天体物理 · 物理学 2013-08-13 Yuandeng Shen , Yu Liu , Jiangtao Su , Hui Li , Ruijuan Zhao , Zhanjun Tian , Kiyoshi Ichimoto , Kazunari Shibata

We present a statistical analysis of 43 coronal dimming events, associated with Earth-directed CMEs that occurred during the period of quasi-quadrature of the SDO and STEREO satellites. We studied coronal dimmings that were observed above…

太阳与恒星天体物理 · 物理学 2020-06-11 Galina Chikunova , Karin Dissauer , Tatiana Podladchikova , Astrid M. Veronig

We present a case study for the global extreme ultraviolet (EUV) wave and its chromospheric counterpart `Moreton-Ramsey wave' associated with the second X-class flare in Solar Cycle 25 and a halo coronal mass ejection (CME). The EUV wave…

We present a statistical study of 62 coronal dimming events associated with Earth-directed CMEs during the quasi-quadrature period of STEREO and SDO. This unique setting allows us to study both phenomena in great detail and compare…

太阳与恒星天体物理 · 物理学 2019-04-10 Karin Dissauer , Astrid M. Veronig , Manuela Temmer , Tatiana Podladchikova

The availability of high quality synoptic observations of the EUV and visible corona during the SOHO mission has advanced our understanding of the low corona manifestations of CMEs. The EUV imager/white light coronagraph connection has been…

太阳与恒星天体物理 · 物理学 2009-08-11 Eva Robbrecht , Spiros Patsourakos , Angelos Vourlidas

Emerging dimming occurs in isolated solar active regions (ARs) during the early stages of magnetic flux emergence. Observed by the Atmospheric Imaging Assembly, it features a rapid decrease in extreme-ultraviolet (EUV) emission in the 171…

太阳与恒星天体物理 · 物理学 2021-05-05 Anna V. Payne , Xudong Sun

Coronal Mass Ejections (CMEs) often show different features in different band-passes. By combining data in white-light (WL) and ultraviolet (UV) bands, we have applied different techniques to derive plasma temperatures, electron density,…

太阳与恒星天体物理 · 物理学 2020-08-19 Beili Ying , Alessandro Bemporad , Li Feng , Lei Lu , Weiqun Gan , Hui Li

The EUV late phase is the second increase of the irradiance of the warm coronal lines during solar flares, and has a crucial impact on the Earth's ionosphere. In this paper, we report on the extremely energetic EUV late phase of a pair of…

太阳与恒星天体物理 · 物理学 2025-12-10 Ya Wang , Sargam M. Mulay , Lyndsay Fletcher

Solar eruptive events, including solar flares and coronal mass ejections (CMEs), are typically characterised by energetically significant X-ray emissions from flare-accelerated electrons and hot thermal plasmas. Occulted events, where the…

太阳与恒星天体物理 · 物理学 2024-11-13 Laura A. Hayes , Säm Krucker , Hannah Collier , Daniel Ryan

We report on observations of an extreme-ultraviolet (EUV) wave event in the Sun on 2011 January 13 by \emph{Solar Terrestrial Relations Observatory} (\emph{STEREO}) and \emph{Solar Dynamics Observatory} (\emph{SDO}) in quadrature. Both the…

太阳与恒星天体物理 · 物理学 2017-01-18 Weiguo Zong , Yu Dai

EUV jets situated in coronal holes are thought to play an important role in supplying heated material to the corona and solar wind. The multi-wavelength capabilities and high signal-to-noise of detectors on-board SDO allows for detailed…

太阳与恒星天体物理 · 物理学 2015-06-17 K. Chandrashekhar , R. J. Morton , D. Banerjee , G. R. Gupta

Coronal extreme-ultraviolet (EUV) waves are large-scale disturbances propagating in the corona, whose physical nature and origin have been discussed for decades. We report the first three dimensional (3D) radiative magneto-hydrodynamic…

太阳与恒星天体物理 · 物理学 2021-04-21 Can Wang , Feng Chen , Mingde Ding

We present and interpret the observations of extreme ultraviolet (EUV) waves associated with a filament eruption on 2011 May 11.The filament eruption also produces a small B-class two ribbon flare and a coronal mass ejection (CME). The…

太阳与恒星天体物理 · 物理学 2016-05-25 R. Chandra , P. F. Chen , A. Fulara , A. K. Srivastava , W. Uddin

We use coronal imaging observations with SDO/AIA, and Hinode/EIS spectral data, to explore the potential of narrow band EUV imaging data for diagnosing the presence of hot (T >~5MK) coronal plasma in active regions. We analyze observations…

太阳与恒星天体物理 · 物理学 2015-06-04 Paola Testa , Fabio Reale

In this paper, we carry out multiwavelength observations of two successive extreme-ultraviolet (EUV) waves originating from active region (AR) NOAA 13575 and a transverse oscillation of a columnar quiescent prominence on 2024 February 9. A…

太阳与恒星天体物理 · 物理学 2024-08-08 Q. M. Zhang , M. S. Lin , X. L. Yan , J. Dai , Z. Y. Hou , Y. Li , Y. Qiu

This study entails the fourth part of a global flare energetics project, in which the mass $m_{\mathrm{cme}}$, kinetic energy $E_{\mathrm{kin}}$, and the gravitational potential energy $E_{\mathrm{grav}}$ of coronal mass ejections (CMEs) is…

太阳与恒星天体物理 · 物理学 2016-11-09 Markus J. Aschwanden

In this Letter, we perform a detailed analysis of the M5.5-class eruptive flare occurring in active region 12929 on 2022 January 20. The eruption of a hot channel generates a fast coronal mass ejection (CME) and a dome-shaped…

太阳与恒星天体物理 · 物理学 2022-10-05 Qingmin Zhang , Chuan Li , Dong Li , Ye Qiu , Yanjie Zhang , Yiwei Ni