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Observations of the solar corona with the Large Angle Spectrometric Coronograph (LASCO) and Extreme ultraviolet Imaging Telescope (EIT) instruments on the Solar and Heliospheric Observatory (SOHO) provide an unprecedented opportunity to…

Astrophysics · Physics 2009-11-06 Prasad Subramanian , K. P. Dere

Images from the Solar Dynamics Observatory (SDO) at 211A are used to identify the solar source of the type III radio bursts seen in WIND/WAVES dynamic spectra. We analyse a 2.5 hour period during which six strong bursts are seen. The radio…

Solar and Stellar Astrophysics · Physics 2015-05-28 D. E. Innes , R. H. Cameron , S. K. Solanki

Using high spatial and temporal data from the New Vacuum Solar Telescope (NVST) and the Solar Dynamics Observatory (SDO), we present unambiguous observations of recurrent two-sided loop jets caused by magnetic reconnection between erupting…

Solar and Stellar Astrophysics · Physics 2020-01-08 Bo Yang , Jiayan Yang , Yi Bi , Zhe Xu , Junchao Hong , Haidong Li , Hechao Chen

Because of its distinctive compositional properties and variability, low-speed ($\lesssim 450$ km s$^{-1}$) solar wind is widely believed to originate from coronal streamers, unlike high-speed wind, which comes from coronal holes. An…

Solar and Stellar Astrophysics · Physics 2021-04-16 Y. -M. Wang , Y. -K. Ko

Explosive events are small transition region phenomena characterised by broad non-Gaussian wings in their line profiles. Images from the Solar Dynamics Observatory (SDO) give a first view of the plasma dynamics at the sites of explosive…

Solar and Stellar Astrophysics · Physics 2015-06-11 Davina Innes , Luca Teriaca

Solar filaments can be formed via chromospheric evaporation followed by condensation in the corona or by the direct injection of cool plasma from the chromosphere to the corona. In this paper, with high-resolution H$\alpha$ data observed by…

Solar and Stellar Astrophysics · Physics 2017-02-22 P. Zou , C. Fang , P. F. Chen , K. Yang , Wenda Cao

Solar wind, classified by its bulk speed and the Alfv\'enic nature of its fluctuations, generates the heliosphere. The elusive physical processes responsible for the generation of the different types of this wind are a topic of active…

Filament eruption is a common phenomenon in solar activity, but the triggering mechanism is not well understood. We focus our study on a filament eruption located in a complex nest of three active regions close to a coronal hole. The…

Solar and Stellar Astrophysics · Physics 2024-06-04 Y. Liu , G. P. Ruan , B. Schmieder , J. H. Guo , Y. Chen , R. S. Zheng , J. T. Su , B. Wang

The solar corona produces coronal rain, hundreds of times colder and denser material than the surroundings. Coronal rain is known to be deeply linked to coronal heating, but its origin, dynamics, and morphology are still not well…

Solar and Stellar Astrophysics · Physics 2023-07-05 Seray Şahin , Patrick Antolin , Clara Froment , Thomas A. Schad

Interest in stealth coronal mass ejections (CMEs) is increasing due to their relatively high occurrence rate and space weather impact. However, typical CME signatures such as extreme-ultraviolet dimmings and post-eruptive arcades are hard…

The spatial inhomogeneity of the distribution of coronal mass ejection (CME) occurrences in the solar atmosphere could provide a tool to estimate the longitudinal position of the most probable CME-capable active regions in the Sun. The…

Solar and Stellar Astrophysics · Physics 2017-03-30 N. Gyenge , T. Singh , T. S. Kiss , A. K. Srivastava , R. Erdélyi

A solar jet on 2014 July 31, which was accompanied by a GOES C1.3 flare and a mini-filament eruption at the jet base, was studied by using observations taken by the New Vacuum Solar Telescope and the Solar Dynamic Observatory. Magnetic…

Solar and Stellar Astrophysics · Physics 2019-11-11 Yuandeng Shen , Zhining Qu , Chengrui Zhou , Yadan Duan , Zehao Tang , Ding Yuan

We follow up on the Sterling et al (2015) discovery that nearly all polar coronal X-ray jets are made by an explosive eruption of closed magnetic field carrying a miniature filament in its core. In the same X-ray and EUV movies used by…

Solar and Stellar Astrophysics · Physics 2018-06-01 Ronald L. Moore , Alphonse C. Sterling , Navdeep K. Panesar

One of the possible mechanisms for heating the solar atmosphere is the magnetic reconnection occurring at different spatio-temporal scales. The discovery of fast bursty nanojets due to reconnection in the coronal loops has been linked to…

Solar and Stellar Astrophysics · Physics 2022-10-26 Ritesh Patel , Vaibhav Pant

Solar nanojets are small-scale jets generated by component magnetic reconnection, characterized by collimated plasma motion perpendicular to the reconnecting magnetic field lines. As an indicator of nanoflare events, they are believed to…

Solar and Stellar Astrophysics · Physics 2025-04-30 Yuhang Gao , Hui Tian , David Berghmans , Yadan Duan , Tom Van Doorsselaere , Hechao Chen , Emil Kraaikamp

Flares and eruptions from solar active regions are associated with atmospheric electrical currents accompanying distortions of the coronal field away from a lowest-energy potential state. In order to better understand the origin of these…

Solar and Stellar Astrophysics · Physics 2016-04-06 C. J. Schrijver

Ubiquitous transition region (TR) network jets are considered to be substantial sources of mass and energy to the corona and solar wind. We conduct a case study of a network jet to better understand the nature of mass flows along its length…

Solar and Stellar Astrophysics · Physics 2022-04-27 J. Gorman , L. P. Chitta , H. Peter

Transient collimated plasma eruptions in the solar corona, commonly known as coronal (or X-ray) jets, are among the most interesting manifestations of solar activity. It has been suggested that these events contribute to the mass and energy…

Solar and Stellar Astrophysics · Physics 2017-08-09 R. Lionello , T. TÖrÖk , V. S. Titov , J. E. Leake , Z. MikiĆ , J. A. Linker , M. G. Linton

Coronal jets are one of the most common eruptive activities in the solar atmosphere. They are related to rich physics processes, including but not limited to magnetic reconnection, flaring, instabilities, and plasma heating. Automated…

Solar and Stellar Astrophysics · Physics 2024-07-12 Jiajia Liu , Chunyu Ji , Yimin Wang , Szabolcs Soós , Ye Jiang , Robertus Erdélyi , M. B. Korsós , Yuming Wang

Coronal mass ejections (CMEs) play a decisive role in driving space weather, especially, the fast ones (e.g., with speeds above $800$~km~s$^{-1}$). Understanding the trigger mechanisms of fast CMEs can help us gaining important information…

Solar and Stellar Astrophysics · Physics 2019-11-06 Peng Zou , Chaowei Jiang , Fengsi Wei , Pingbing Zuo , Yi Wang
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