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Coronal bright points (CBPs) are small-scale and long-duration brightenings in the lower solar corona. They are often explained in terms of magnetic reconnection. We aim to study the sub-structures of a CBP and clarify the relationship…

太阳与恒星天体物理 · 物理学 2014-09-05 Q. M. Zhang , P. F. Chen , M. D. Ding , H. S. Ji

The formation of double-decker filaments has long been an enigma in the field of solar physics. Using stereoscopic observations from the Solar Dynamics Observatory and the Solar Terrestrial Relations Observatory, we show that the…

太阳与恒星天体物理 · 物理学 2025-05-21 Dongxu Liu , Yuandeng Shen , Yi Bi , Zehao Tang , Chengrui Zhou , Surui Yao

UV bursts and Ellerman bombs are transient brightenings observed in the low solar atmospheres of emerging flux regions. Observations have discovered the cospatial and cotemporal EBs and UV bursts, and their formation mechanisms are still…

太阳与恒星天体物理 · 物理学 2021-02-17 Lei Ni , Yajie Chen , Hardi Peter , Hui Tian , Jun Lin

Extreme UV (EUV) and X-ray loops in the solar corona connect regions of enhanced magnetic activity, but they are not usually rooted in the dark umbrae of sunspots because the strong magnetic field found there suppresses convection. This…

太阳与恒星天体物理 · 物理学 2016-02-17 L. P. Chitta , H. Peter , P. R. Young

The fast solar wind that fills the heliosphere originates from deep within regions of open magnetic field on the Sun called coronal holes. The energy source responsible for accelerating the plasma to high speeds is widely debated, however…

Arch-like loop structures filled with million Kelvin hot plasma form the building blocks of the quiet-Sun corona. Both high-resolution observations and magnetoconvection simulations show the ubiquitous presence of magnetic fields on the…

How magnetic energy is injected and released in the solar corona, keeping it heated to several million degrees, remains elusive. Coronal heating generally increases with increasing magnetic field strength. From comparison of a non-linear…

太阳与恒星天体物理 · 物理学 2017-07-19 Sanjiv K. Tiwari , Julia K. Thalmann , Navdeep K. Panesar , Ronald L. Moore , Amy R. Winebarger

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

Magnetic reconnection plays a crucial role in the energy release process for different kinds of solar eruptions and activities. The rapid solar eruption requires a fast reconnection model. Plasmoid instability in the reconnecting current…

太阳与恒星天体物理 · 物理学 2024-05-01 Guanchong Cheng , Lei Ni , Zehao Tang , Yajie Chen , Yuhao Chen , Jialiang Hu , Jun Lin

A light bridge is a magnetic intrusion into a sunspot, it interacts with the main magnetic field and excites a variety of dynamical processes. In the letter, we studied magnetic connectivity between a light bridge and coronal loops rooted…

太阳与恒星天体物理 · 物理学 2021-07-21 Yuhu Miao , Libo Fu , Xian Du , Ding Yuan , Chaowei Jiang , Jiangtao Su , Mingyu Zhao , Sergey Anfinogentov

We developed a new technique for registration of the far solar corona from ground-based observations at distances comparable to those obtained from space coronagraphs. It makes possible visualization of fine details of studied objects…

太阳与恒星天体物理 · 物理学 2015-05-14 Y. Y. Shopov , D. A. Stoykova , K. Stoitchkova , L. T. Tsankov , A. Tanev , Kl. Burin , St. Belchev , V. Rusanov , D. Ivanov , A. Stoev , P. Muglova , I. Iliev

We present experimental evidence of the coronal mass ejection (CME) breakout reconnection, observed by the TESIS EUV telescope. The telescope could observe solar corona up to 2 $R_\odot$ from the Sun center in the Fe 171 \AA\ line. Starting…

太阳与恒星天体物理 · 物理学 2016-01-19 Anton Reva , Artem Ulyanov , Sergey Shestov , Sergey Kuzin

We report on the discovery of periodic coronal rain in an off-limb sequence of {\it Solar Dynamics Observatory}/Atmospheric Imaging Assembly images. The showers are co-spatial and in phase with periodic (6.6~hr) intensity pulsations of…

太阳与恒星天体物理 · 物理学 2018-02-21 F. Auchère , C. froment , E. Soubrié , P. Antolin , R. Oliver , G. Pelouze

Why the tenuous solar outer atmosphere, or corona, is much hotter than the underlying layers remains one of the greatest challenge for solar modeling. Detailed diagnostics of the coronal thermal structure come from extreme ultraviolet (EUV)…

太阳与恒星天体物理 · 物理学 2018-05-02 Gregory Fleishman , Sophie Musset , Véronique Bommier , Lindsay Glesener

A significant impediment to solving the coronal heating problem is that we currently only observe active region (AR) loops in their cooling phase. Previous studies showed that the evolution of cooling loop densities and apex temperatures…

太阳与恒星天体物理 · 物理学 2024-01-10 David H. Brooks , Jeffrey W. Reep , Ignacio Ugarte-Urra , John E. Unverferth , Harry P. Warren

The quiet solar corona consists of myriads of loop-like features, with magnetic fields originating from network and internetwork regions on the solar surface. The continuous interaction between these different magnetic patches leads to…

太阳与恒星天体物理 · 物理学 2021-04-13 L. P. Chitta , H. Peter , P. R. Young

We report on high-resolution imaging and spectral observations of eruptions of a spiral structure in the transition region, which were taken with the Interface Region Imaging Spectrometer (IRIS), the Atmospheric Imaging Assembly (AIA) and…

太阳与恒星天体物理 · 物理学 2018-02-28 Zhenghua Huang , Lidong Xia , Chris J. Nelson , Jiajia Liu , Thomas Wiegelmann , Hui Tian , James A. Klimchuk , Yao Chen , Bo Li

Current sheets are essential for energy dissipation in the solar corona, in particular by enabling magnetic reconnection. Unfortunately, sufficiently thin current sheets cannot be resolved observationally and the theory of their formation…

天体物理学 · 物理学 2025-07-21 Joerg Buechner

The motion of faint propagating disturbances (PD) in the solar corona reveals an intricate structure which must be defined by the magnetic field. Applied to quiet Sun observations by the Atmospheric Imaging Assembly (AIA)/Solar Dynamics…

太阳与恒星天体物理 · 物理学 2022-07-20 Huw Morgan , Marianna Korsos

We aim to reproduce the structure of the corona above a solar active region as seen in the extreme ultraviolet (EUV) using a three-dimensional magnetohydrodynamic (3D MHD) model. The 3D MHD data-driven model solves the induction equation…

太阳与恒星天体物理 · 物理学 2019-04-30 Jörn Warnecke , Hardi Peter