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Jets present ubiquitously in both quiet and active regions on the Sun. They are widely believed to be driven by magnetic reconnection. A fan-spine structure has been frequently reported in some coronal jets and flares, regarded as a…

Solar and Stellar Astrophysics · Physics 2016-03-16 Zhicheng Zeng , Bin Chen , Haisheng Ji , Philip R. Goode , Wenda Cao

We investigated three fan-shaped jets observed above sunspot light bridges or nearby sunspot regions. The study aimed to explore the dynamics and physical properties of jets' features that appear as blob-like structures at the tips of the…

Solar and Stellar Astrophysics · Physics 2025-07-24 Heesu Yang , Maria S. Madjarska , EunKyung Lim , Daniel Nóbrega-Siverio , Klaus Galsgaard

Jets often have a helical structure containing ejected plasma that is both hot and also cooler and denser than the corona. Various mechanisms have been proposed to explain how jets are primarily attributed to a magnetic reconnection between…

Solar and Stellar Astrophysics · Physics 2020-10-21 Reetika Joshi , Brigitte Schmieder , Guillaume Aulanier , Véronique Bommier , Ramesh Chandra

Coronal jets are eruptions identified by a collimated, sometimes twisted spire. They are small-scale energetic events compared with flares. Using multi-wavelength observations from the Solar Dynamics Observatory/Atmospheric Imaging Assembly…

Solar and Stellar Astrophysics · Physics 2023-05-24 Jiahao Zhu , Yang Guo , Mingde Ding , Brigitte Schmieder

Fan-spine magnetic structure, as a fundamental three-dimensional topology in magnetic reconnection theory, plays a crucial role in producing solar jets. However, how fan-spine configurations form in the solar atmosphere remains elusive.…

Solar and Stellar Astrophysics · Physics 2024-02-08 Yadan Duan , Hui Tian , Hechao Chen , Yuandeng Shen , Zheng Sun , Zhenyong Hou , Chuan Li

We analysed Interface-Region Imaging Spectrograph (IRIS) and the Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA) observations of a small coronal jet that occurred at the solar west limb on 2014 August 29. The jet source…

Solar and Stellar Astrophysics · Physics 2024-05-09 Pradeep Kayshap , Judith T. Karpen , Pankaj Kumar

We studied temporal changes of morphological and magnetic properties of a succession of four confined flares followed by an eruptive flare using the high-resolution New Solar Telescope (NST) operating at the Big Bear Solar Observatory…

Recurrent chromospheric fan-shaped jets highlight the highly dynamic nature of the solar atmosphere. They have been named as ''light walls'' or ''peacock jets'' in high-resolution observations. In this study, we examined the underlying…

Solar and Stellar Astrophysics · Physics 2025-04-28 Annu Bura , Tanmoy Samanta , Avijeet Prasad , Ronald L. Moore , Alphonse C. Sterling , Vasyl Yurchyshyn , Arun Surya

We present observations of a chromospheric jet and growing "loop" system that show new evidence of a fan-spine topology resulting from magnetic flux emergence. This event, occurring in an equatorial coronal hole on 2007 February 9, was…

Solar and Stellar Astrophysics · Physics 2015-03-17 Wei Liu , Thomas E. Berger , Alan M. Title , Theodore D. Tarbell , B. C. Low

Recent high-resolution solar observations have unveiled the presence of small-scale loop-like structures in the lower solar atmosphere, often referred to as unresolved fine structures, low-lying loops, and miniature hot loops. These…

Solar and Stellar Astrophysics · Physics 2025-03-14 Annu Bura , Tanmoy Samanta , Alphonse Sterling , Yajie Chen , Jayant Joshi , Vasyl Yurchyshyn , Ronald L. Moore

Solar jets, characterized by small-scale plasma ejections along open magnetic field lines or the legs of large-scale coronal loops, play a crucial role in the dynamics of the solar atmosphere. Although spectral and EUV images have been…

The commonly observed jets provide critical information on the small-scale energy release in the solar atmosphere. We report a near disk-center jet on 2010 July 20, observed by the Solar Dynamics Observatory. In this event, the standard…

Solar and Stellar Astrophysics · Physics 2015-05-28 Chang Liu , Na Deng , Rui Liu , Ignacio Ugarte-Urra , Shuo Wang , Haimin Wang

On the Sun,jets in light bridges are frequently observed with high-resolution instruments.The respective roles played by convection and the magnetic field in triggering such jets are not yet clear.We report a small fan-shaped jet along a LB…

Solar and Stellar Astrophysics · Physics 2022-11-02 Y. Liu , G. P. Ruan , B. Schmieder , S. Masson , Y. Chen , J. T. Su , B. Wang , X. Y. Bai , Y. Su , Wenda Cao

We present the results of high resolution co-temporal and co-spatial photospheric and chromospheric observations of sunspot penumbral intrusions. The data was taken with the Swedish Solar Telescope (SST) on the Canary Islands. Time series…

Solar and Stellar Astrophysics · Physics 2015-09-08 L. Bharti , S. K. Solanki , J. Hirzberger

Solar jets are observed as collimated plasma beams over a large range of temperatures and wavelengths. They have been observed in Halpha and optical lines for more than 50 years and called surges. The term "jet" comes from X-ray…

Solar and Stellar Astrophysics · Physics 2022-01-28 Brigitte Schmieder

A three-dimensional numerical experiment of the launching of a hot and fast coronal jet followed by several violent eruptions is analyzed in detail. These events are initiated through the emergence of a magnetic flux rope from the solar…

Solar and Stellar Astrophysics · Physics 2015-06-15 Fernando Moreno-Insertis , Klaus Galsgaard

Using simulated data-driven three-dimensional resistive MHD simulations of the solar atmosphere, we show that magnetic reconnection can be responsible of the formation of jets with characteristic of Type II spicules. For this, we…

Solar and Stellar Astrophysics · Physics 2018-04-06 J. J. González-Avilés , F. S. Guzmán , V. Fedun , G. Verth , S. Shelyag , S. Regnier

Transient collimated plasma ejections (jets) occur frequently throughout the solar corona, in active regions, quiet Sun, and coronal holes. Although magnetic reconnection is generally agreed to be the mechanism of energy release in jets,…

Solar and Stellar Astrophysics · Physics 2019-11-13 Pankaj Kumar , Judith T. Karpen , Spiro K. Antiochos , Peter F. Wyper , C. Richard DeVore

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

Magnetic reconnection is a fundamental process in space and astrophysical plasmas in which oppositely directed magnetic fields changes its connectivity and eventually converts its energy into kinetic and thermal energy of the plasma.…

Solar and Stellar Astrophysics · Physics 2010-12-20 Rong Lin Jiang , Kazunari Shibata , Hiroaki Isobe , Cheng Fang
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