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We analyze and model an M1.0 flare observed by SDO/AIA and Hinode/EIS to investigate how flare loops are heated and evolve subsequently. The flare is composed of two distinctive loop systems observed in EUV images. The UV 1600 \AA emission…

Solar and Stellar Astrophysics · Physics 2015-06-11 Y. Li , J. Qiu , M. D. Ding

We present detailed analysis of an extreme ultraviolet (EUV) wave and its interaction with active region (AR) loops observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the Hinode EUV Imaging Spectrometer (EIS). This…

Solar and Stellar Astrophysics · Physics 2015-06-16 Liheng Yang , Jun Zhang , Wei Liu , Ting Li , Yuandeng Shen

Recent observations in extreme-ultraviolet (EUV) wavelengths reveal an EUV late phase in some solar flares that is characterized by a second peak in warm coronal emissions ($\sim3$~MK) several tens of minutes to a few hours after the soft…

Solar and Stellar Astrophysics · Physics 2018-05-02 Yu Dai , Mingde Ding

We present observations of an eruptive solar flare on 2016 January 6 that occurred behind the solar limb from the perspective of the Earth, but was well observed by STEREO and the Solar Extreme Ultraviolet Monitor on the Mars Atmosphere and…

For the first time, the kinematic evolution of a coronal wave over the entire solar surface is studied. Full Sun maps can be made by combining images from the Solar Terrestrial Relations Observatory satellites, Ahead and Behind, and the…

Solar and Stellar Astrophysics · Physics 2015-06-05 Oscar Olmedo , Angelos Vourlidas , Jie Zhang , Xin Cheng

The kinematics of a globally propagating disturbance (also known as an ``EIT wave") is discussed using Extreme UltraViolet Imager (EUVI) data Solar Terrestrial Relations Observatory (STEREO). We show for the first time that an impulsively…

Astrophysics · Physics 2009-11-13 David M. Long , Peter T. Gallagher , R. T. James McAteer , D. Shaun Bloomfield

We present here the kinematics of the EUV wave associated with a GOES M1.0-class solar flare, which originates in NOAA AR 12740. The event is thoroughly observed with Atmospheric Imaging Assembly (AIA) onboard Solar Dynamics Observatory…

Solar and Stellar Astrophysics · Physics 2022-04-13 Ramesh Chandra , P. F. Chen , Pooja Devi , Reetika Joshi , Y. W. Ni

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,…

Solar and Stellar Astrophysics · Physics 2020-08-19 Beili Ying , Alessandro Bemporad , Li Feng , Lei Lu , Weiqun Gan , Hui Li

We derive kinematic properties for two recent solar coronal transient waves observed off the western solar limb with the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) mission. The two waves occurred over…

Solar and Stellar Astrophysics · Physics 2014-06-11 Kamen A. Kozarev , Kelly E. Korreck , Vasili V. Lobzin , Mark A. Weber , Nathan A. Schwadron

EUV imaging observations from several space missions (SOHO/EIT, TRACE, and SDO/AIA) have revealed a presence of propagating intensity disturbances in solar coronal loops. These disturbances are typically interpreted as slow magnetoacoustic…

Solar and Stellar Astrophysics · Physics 2018-01-24 Elena Provornikova , Leon Ofman , Tongjiang Wang

New study confirms conclusions made in [M. Eselevich, and V. Eselevich, 2008]; according to it, there is a disturbed region expended along the CME propagation direction in front of a coronal mass ejection whose velocity $u$ is lower than…

Solar and Stellar Astrophysics · Physics 2014-11-20 M Eselevich

One of the major discoveries of the Extreme ultraviolet Imaging Telescope (EIT) on SOHO were intensity enhancements propagating over a large fraction of the solar surface. The physical origin(s) of the so-called `EIT' waves is still…

Solar and Stellar Astrophysics · Physics 2015-05-13 S. Patsourakos , A. Vourlidas , Y. -M. Wang , G. Stenborg , A. Thernisien

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…

Solar and Stellar Astrophysics · Physics 2015-06-17 K. Chandrashekhar , R. J. Morton , D. Banerjee , G. R. Gupta

We present SDO/AIA observations of the interaction of a global EUV wave on 2011 June 7 with active regions (ARs), coronal holes (CHs) and coronal bright structures. The primary global wave has a three-dimensional dome shape, with…

Solar and Stellar Astrophysics · Physics 2015-06-03 Ting Li , Jun Zhang , Shuhong Yang , Wei Liu

On 13 February 2009, a coronal wave -- CME -- dimming event was observed in quadrature by the STEREO spacecraft. We analyze this event using a three-dimensional, global magnetohydrodynamic (MHD) model for the solar corona. The numerical…

Solar and Stellar Astrophysics · Physics 2014-11-20 Ofer Cohen , Gemma D. R. Attrill , Ward B. Manchester , Meredith J. Wills-Davey

We perform a time-dependent ionization analysis to constrain plasma heating requirements during a fast partial halo coronal mass ejection (CME) observed on 2000 June 28 by the Ultraviolet Coronagraph Spectrometer (UVCS) aboard the Solar and…

Solar and Stellar Astrophysics · Physics 2011-06-21 N. A. Murphy , J. C. Raymond , K. E. Korreck

Coronae express different facets of their energy release processes in different wavelength regions. While soft X-ray and EUV emission dominates the radiative losses of the thermal plasma, hard X-ray emission (>10 keV) can be produced from…

Astrophysics · Physics 2007-05-23 Manuel Guedel

High resolution spectra from the Hinode EUV Imaging Spectrometer (EIS) have revealed that coronal spectral line profiles are sometimes asymmetric, with a faint enhancement in the blue wing on the order of 100 km/s. These asymmetries could…

Solar and Stellar Astrophysics · Physics 2015-06-11 David H. Brooks , Harry P. Warren

The propagation of disturbances in the solar atmosphere is inherently three dimensional (3D), yet comprehensive studies on the spatial structure and dynamics of 3D wavefronts are scarce. Here we conduct high resolution 3D numerical…

Solar and Stellar Astrophysics · Physics 2024-12-19 Jialiang Hu , Jing Ye , Yuhao Chen , Zhixing Mei , Shanshan Xu , Jun Lin

We measured for the first time the electron density in an Extreme Ultra-Violet induced plasma. This is achieved in a low-pressure argon plasma by using a method called microwave cavity resonance spectroscopy. The measured electron density…

Plasma Physics · Physics 2014-07-07 R. M. van der Horst , J. Beckers , S. Nijdam , G. M. W. Kroesen