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Observations of the off-limb corona with the SWAP wide-field telescope in the 174\,\AA\ passband onboard the PROBA2 mission provide an opportunity to study post-eruptive processes in the dimming regions. We investigate morphology, temporal…

太阳与恒星天体物理 · 物理学 2020-03-26 F. Goryaev , V. Slemzin , D. Rodkin

Observations of active regions and limb prominences often show cold, dense blobs descending with an acceleration smaller than that of free fall. The dynamics of these condensations falling in the solar corona is investigated in this paper…

太阳与恒星天体物理 · 物理学 2014-03-03 R. Oliver , R. Soler , J. Terradas , T. V. Zaqarashvili , M. L. Khodachenko

Solar eruptive events such as coronal mass ejections and eruptive flares are frequently associated with the emergence of magnetic flux from the convection zone into the corona. We use three dimensional magnetohydrodynamic numerical…

太阳与恒星天体物理 · 物理学 2022-07-27 James Leake , Mark Linton , Spiro Antiochos

The EUI instrument on the Solar Orbiter spacecraft has obtained the most stable, high-resolution images of the solar corona from its orbit with a perihelion near 0.4 AU. A sequence of 360 images obtained at 17.1 nm, between 25-Oct-2022…

太阳与恒星天体物理 · 物理学 2023-09-12 Philip G. Judge

Employing Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) multi-wavelength images, we have presented coronal condensations caused by magnetic reconnection between a system of open and closed solar coronal loops. In this…

太阳与恒星天体物理 · 物理学 2019-01-16 Leping Li , Jun Zhang , Peter Hardi , Lakshmi Pradeep Chitta , Jiangtao Su , Hongqiang Song , Chun Xia , Yijun Hou

The opening-up of the magnetic field during solar eruptive events is often accompanied by a dimming of the local coronal emission. From observations of filament eruptions recorded with the Extreme-Ultraviolet Imager on STEREO during…

太阳与恒星天体物理 · 物理学 2011-03-10 Eva Robbrecht , Yi-Ming Wang

In solar atmosphere, magnetic reconnection alters the topological connectivity, and magnetic energy is released. However, the length change of the reconnecting structures has rarely been reported. To identify the evolution of the…

太阳与恒星天体物理 · 物理学 2025-12-18 Jun Zhang , Tao Ding , Yulei Wang

The \textit{Sun Watcher using Active Pixel system detector and Image Processing}(SWAP) on board the \textit{PRoject for OnBoard Autonomy\todash 2} (PROBA\todash 2) spacecraft provides images of the solar corona in EUV channel centered at…

太阳与恒星天体物理 · 物理学 2012-06-11 K. Chandrashekhar , S. Krishna Prasad , D. Banerjee , B. Ravindra , Daniel B. Seaton

Coronal waves are large-scale disturbances often driven by coronal mass ejections (CMEs). We investigate a spectacular wave event on 7 March 2012, which is associated with an X5.4 flare (SOL2012-03-07). By using a running center-median…

太阳与恒星天体物理 · 物理学 2020-11-04 Li Feng , Lei Lu , Bernd Inhester , Joseph Plowman , Beili Ying , Marilena Mierla , Matthew J. West , Weiqun Gan

Parker Solar Probe's first encounters with the Sun revealed the presence of ubiquitous localised magnetic deflections in the inner heliosphere; these structures, often called switchbacks, are particularly striking in solar wind streams…

We present the first results of three-dimensional (3D) numerical magnetohydrodynamic (MHD) simulations of the onset of magnetic reconnection via the tearing instability in dynamically thinning current sheets in the solar corona. In all our…

太阳与恒星天体物理 · 物理学 2024-06-10 James Leake , Lars Daldorff , James Klimchuk

We intend to investigate the underlying physics for the coronal rain phenomenon in a representative bipolar magnetic field, including the formation and the dynamics of coronal rain blobs. With the MPI-AMRVAC code, we performed three…

太阳与恒星天体物理 · 物理学 2017-07-05 Chun Xia , Rony Keppens , Xia Fang

Magnetic reconnection plays an integral part in nearly all models of solar flares and coronal mass ejections (CMEs). The reconnection heats and accelerates the plasma, produces energetic electrons and ions, and changes the magnetic topology…

太阳与恒星天体物理 · 物理学 2017-07-26 John C. Raymond , Silvio Giordano , Angela Ciaravella

Coronal mass ejections (CMEs) are often accompanied by coronal dimming evident in extreme ultraviolet (EUV) and soft X-ray observations. The locations of dimming are sometimes considered to map footpoints of the erupting flux rope. As the…

太阳与恒星天体物理 · 物理学 2016-07-06 J. X. Cheng , J. Qiu

The Sun's outer atmosphere, the corona, is maintained at mega-Kelvin temperatures and fills the heliosphere with a supersonic outflowing wind. The dissipation of magnetic waves and direct electric currents are likely to be the most…

太阳与恒星天体物理 · 物理学 2025-03-21 A. K. Srivastava , Sripan Mondal , Eric R. Priest , Sudheer K. Mishra , David I. Pontin , R. Y. Kwon , Ding Yuan , K. Murawski , Ayumi Asai

Magnetic reconnection in the quiet Sun is a phenomenon that is consistently observed, and it has recently become feasible to simulate via 3D numerical models of realistically stratified and convection-driven reconnection. We aim to…

太阳与恒星天体物理 · 物理学 2022-12-21 Rebecca Robinson , Mats Carlsson , Guillaume Aulanier

With the data from the Atmospheric Imaging Assembly (AIA) and the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO), we present a magnetic interaction between an isolated coronal hole (CH) and an emerging…

太阳与恒星天体物理 · 物理学 2015-06-17 L. Ma , Z. Q. Qu , X. L. Yan , Z. K. Xue

Reconnection between pairs of solar magnetic flux elements, one open and the other a closed loop, is theorised to be a crucial process for both maintaining the structure of the corona and producing the solar wind. This 'interchange…

太阳与恒星天体物理 · 物理学 2020-09-04 Allan R Macneil , Mathew J Owens , Laura Berčič , Adam J Finley

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 the first model that couples the formation of the corona of a solar active region to a model of the emergence of a sunspot pair. This allows us to study when, where, and why active region loops form, and how they evolve. We use a…

太阳与恒星天体物理 · 物理学 2014-05-08 F. Chen , H. Peter , S. Bingert , M. C. M. Cheung