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Solar eruptions are sudden ejections of coronal mass and magnetic fields accompanied by intense energy release. The eruptive structure does not always erupt successfully, but sometimes fails to escape the Sun after initiation. The failure…

太阳与恒星天体物理 · 物理学 2026-05-21 Tingyu Gou , Katharine K. Reeves , Peter R. Young , Astrid M. Veronig , Xingyao Chen , Sijie Yu , Bin Chen , Bin Zhuang

In this work, we examine the association between solar active regions and 152 solar flares, coronal mass ejections, and solar energetic particle (SEP) events over solar cycles 23-24 (1997-2017). The CDAW center's GOES data in the energy…

太阳与恒星天体物理 · 物理学 2025-04-21 Raj Kumar , Ramesh Chandra , Bimal Pande , Seema Pande

Coronal mass ejection (CME) often produces a soft X-ray (SXR) flare associated with the low-coronal reconnection and a type-II radio burst associated with an interplanetary (IP) CME-shock. SXR flares and type-II bursts outshine the…

太阳与恒星天体物理 · 物理学 2024-10-02 Atul Mohan , Nat Gopalswamy , Hemapriya Raju , Sachiko Akiyama

Context. Some of the most prominent sources for particle acceleration in our Solar System are large eruptions of magnetised plasma from the Sun called coronal mass ejections (CMEs). These accelerated particles can generate radio emission…

太阳与恒星天体物理 · 物理学 2020-03-11 D. E. Morosan , E. Palmerio , J. Pomoell , R. Vainio , M. Palmroth , E. K. J. Kilpua

The reason for the occurrence of different elements of the fine structure of solar radio bursts in the decimeter and centimeter wavelength ranges has been determined based on all available data from terrestrial and satellite observations.…

太阳与恒星天体物理 · 物理学 2017-11-22 G. P. Chernov , V. V. Fomichev , Y. Yan , B. Tan , Ch. Tan , Q. Fu

During solar minimum, the Sun is relatively inactive with few sunspots observed on the solar surface. Consequently, we observe a smaller number of highly energetic events such as solar flares or coronal mass ejections (CMEs), which are…

太阳与恒星天体物理 · 物理学 2021-07-06 P. Bhowmik , A. R. Yeates

Solar energetic particles are a result of intense solar events such as solar flares and Coronal Mass Ejections (CMEs). These latter events all together can cause major disruptions to spacecraft that are in Earth's orbit and outside of the…

太阳与恒星天体物理 · 物理学 2017-12-13 Soukaina Filali Boubrahimi , Berkay Aydin , Petrus Martens , Rafal Angryk

Solar filaments/prominences are one of the most common features in the corona, which may lead to energetic coronal mass ejections (CMEs) and flares when they erupt. Filaments are about one hundred times cooler and denser than the coronal…

太阳与恒星天体物理 · 物理学 2017-02-22 Hongqiang Song , Yao Chen , Bo Li , Leping Li , Liang Zhao , Jiansen He , Die Duan , Xin Cheng , Jie Zhang

The state of the space environment plays a significant role for forecasting of geomagnetic storms produced by disturbances of the solar wind (SW). Coronal mass ejections (CMEs) passing through the heliosphere often have a prolonged (up to…

空间物理 · 物理学 2022-04-27 Vladimir Slemzin , Farid Goryaev , Denis Rodkin

A characteristic pattern of solar hard X-ray emission, first identified in SOL1969-03-30 by Frost & Dennis (1971), turns out to have a close association with the prolonged high-energy gamma-ray emission originally observed by Forrest et al.…

太阳与恒星天体物理 · 物理学 2018-08-22 Hugh S. Hudson

The physical processes, which drive powerful solar eruptions, play an important role in our understanding of the Sun-Earth connection. In this Special Issue, we firstly discuss how magnetic fields emerge from the solar interior to the solar…

太阳与恒星天体物理 · 物理学 2019-06-12 Vasilis Archontis , Loukas Vlahos

The timing of 503 solar flares observed simultaneously in hard X-rays, soft X-rays and H-alpha is analyzed. We investigated the start and the peak time differences in different wavelengths, as well as the differences between the end of the…

天体物理学 · 物理学 2015-06-24 A. Veronig , B. Vrsnak , M. Temmer , A. Hanslmeier

We have statistically analyzed a set of 115 low frequency (Deca- Hectometer wavelengths range) type II and type III bursts associated with major Solar Energetic Particle (SEP: Ep > 10 MeV) events and their solar causes such as solar flares…

太阳与恒星天体物理 · 物理学 2020-07-14 P. Pappa Kalaivani , A. Shanmugaraju , O. Prakash , R. -S. Kim

Space weather refers to dynamic conditions on the Sun and in the space environment of the Earth, which are often driven by solar eruptions and their subsequent interplanetary disturbances. It has been unclear how an extreme space weather…

Solar flares are energetic events taking place in the Sun's atmosphere, and their effects can greatly impact the environment of the surrounding planets. In particular, eruptive flares, as opposed to confined flares, launch coronal mass…

太阳与恒星天体物理 · 物理学 2016-01-20 Miho Janvier , Guillaume Aulanier , Pascal Demoulin

We explore the processes of repetitive build-up and explosive release of magnetic energy together with the formation of magnetic flux ropes that eventually resulted into three homologous eruptive flares of successively increasing…

太阳与恒星天体物理 · 物理学 2023-02-08 Suraj Sahu , Bhuwan Joshi , Avijeet Prasad , Kyung-Suk Cho

Context. Coronal mass ejections (CMEs) are large eruptions of magnetised plasma from the Sun that are often accompanied by solar radio bursts produced by accelerated electrons. Aims. A powerful source for accelerating electron beams are…

太阳与恒星天体物理 · 物理学 2020-10-14 D. E. Morosan , E. Palmerio , J. E. Räsänen , E. K. J. Kilpua , J. Magdalenić , B. J. Lynch , A. Kumari , J. Pomoell , M. Palmroth

We present the results of a detailed analysis of multi-wavelength observations of a very impulsive solar flare 1B/M6.7, which occurred on 10 March, 2001 in NOAA AR 9368 (N27 W42). The observations show that the flare is very impulsive with…

天体物理学 · 物理学 2009-11-10 Wahab Uddin , Rajmal Jain , Keiji Yoshimura , Ramesh Chandra , T. Sakao , T. Kosugi , Anita Joshi , M. R. Despande

The nature of various plausible causal links between sympathetic events is still a controversial issue. In this work, we present multi-wavelength observations of sympathetic eruptions, associated flares and coronal mass ejections (CMEs)…

太阳与恒星天体物理 · 物理学 2016-04-13 Navin Chandra Joshi , Brigitte Schmieder , Tetsuya Magara , Yang Guo , Guillaume Aulanier

Large solar flares and eruptions may influence remote regions through perturbations in the outer-atmospheric magnetic field, leading to causally related events outside of the primary or triggering eruptions that are referred to as…

太阳与恒星天体物理 · 物理学 2015-11-04 Carolus J. Schrijver , Paul A. Higgins