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On 29 August 2014, the trigger and evolution of a cusp-shaped jet were captured in detail at 1330 {\AA} by the Interface Region Imaging Spectrograph.At first, two neighboring mini-prominences arose in turn from low solar atmosphere and…

Solar and Stellar Astrophysics · Physics 2017-08-09 Zhang Yuzong , Zhang Jun

The heating of the solar chromosphere and corona is a long-standing puzzle in solar physics. Hinode observations show the ubiquitous presence of chromospheric anemone jets outside sunspots in active regions. They are typically 3 to 7 arc…

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

Magnetic reconnection driving two-sided-loop jet is typically associated with interactions between an emerging bipole and the overlying horizontal magnetic field, or between filaments from separate magnetic systems. Leveraging high temporal…

Solar and Stellar Astrophysics · Physics 2025-09-03 Yunxue Huang , Jialin Li , Zhining Qu , Ke Yu , Hongfei Liang , Rui Xue , Xinping Zhou

Certain solar flares exhibit a distinctive candle-flame or cusp-shaped feature above the bright flare arcade visible in extreme ultraviolet (EUV) and X-ray channels sensitive to high-temperature plasma. The presence of a cusp-like structure…

Solar and Stellar Astrophysics · Physics 2026-05-19 Ivan Oparin , Sabastian Fernandes , Bin Chen , Chengcai Shen , Xiaocan Li , Fan Guo , Sijie Yu

The rotational motion of solar jets is believed to be a signature of the untwisting process resulting from magnetic reconnection, which takes place between twisted closed magnetic loops (i.e., magnetic flux ropes) and open magnetic field…

Solar and Stellar Astrophysics · Physics 2017-12-29 Jiajia Liu , Robert Erdélyi , Yuming Wang , Rui Liu

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 results from the first self-consistent multi-fluid simulations of chromospheric magnetic reconnection in a weakly ionized reacting plasma. We simulate two dimensional magnetic reconnection in a Harris current sheet with a…

Plasma Physics · Physics 2014-03-04 James E. Leake , Vyacheslav S. Lukin , Mark G. Linton , Eric T. Meier

Magnetic reconnection plays a crucial role in powering solar flares, production of energetic particles, and plasma heating. However, where the magnetic reconnections occur, how and where the released magnetic energy is transported, and how…

Solar and Stellar Astrophysics · Physics 2020-09-02 Sijie Yu , Bin Chen , Katharine K. Reeves , Dale E. Gary , Sophie Musset , Gregory D. Fleishman , Gelu M. Nita , Lindsay Glesener

The evolution of the photospheric magnetic field plays a key role in the energy transport into the chromosphere and the corona. In active regions, newly emerging magnetic flux interacts with the pre-existent magnetic field, which can lead…

Solar and Stellar Astrophysics · Physics 2021-04-07 C. J. Díaz Baso , J. de la Cruz Rodríguez , J. Leenaarts

We analyse an absorption event within the H$\alpha$ line wings, identified as a surge, and the co-spatial evolution of an EUV brightening, with spatial and temporal scales analogous to a small blinker. We conduct a multi-wavelength,…

Solar and Stellar Astrophysics · Physics 2015-06-17 C. J. Nelson , J. G. Doyle

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

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

Three extreme-ultraviolet (EUV) jets recurred in about one hour on 2010 September 17 in the following magnetic polarity of active region 11106. The EUV jets were observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics…

Solar and Stellar Astrophysics · Physics 2015-06-15 Y. Guo , P. Démoulin , B. Schmieder , M. D. Ding , S. Vargas Domínguez , Y. Liu

Magnetic reconnection is a well-accepted part of the theory of solar eruptive events, though the evidence is still circumstantial. Intrinsic to the reconnection picture of a solar eruptive event, particularly in the standard model for…

Solar and Stellar Astrophysics · Physics 2017-09-20 Juntao Wang , P. J. A. Simoes , N. L. S. Jeffrey , L. Fletcher , P. J. Wright , I. G. Hannah

A recent study using {\it Hinode} (SOT/FG) data of a sunspot revealed some unusually large penumbral jets that often repeatedly occurred at the same locations in the penumbra, namely at the tail of a penumbral filament or where the tails of…

We investigate the occurrence of slipping magnetic reconnection, chromospheric evaporation, and coronal loop dynamics in the 2014 September 10 X-class flare. The slipping reconnection is found to be present throughout the flare from its…

We investigate the onset of 2D time-dependent magnetic reconnection that is triggered using an external velocity driver located away from, and perpendicular to, an equilibrium Harris current sheet. Previous studies have typically utilised…

Solar and Stellar Astrophysics · Physics 2018-01-24 B. Snow , G. J. J. Botha , J. A. McLaughlin , A. Hillier

High-resolution Very-Long-Baseline Interferometry observations of relativistic jets are essential to constrain fundamental parameters of jet formation models. At a distance of 249 Mpc, Cygnus A is a unique target for such studies, being the…

High Energy Astrophysical Phenomena · Physics 2015-12-16 B. Boccardi , T. P. Krichbaum , U. Bach , F. Mertens , E. Ros , W. Alef , J. A. Zensus

The emergence of magnetic flux into the solar atmosphere produces, among other phenomena, Ellerman bombs (EBs), which are observed in H alpha and are due to magnetic reconnection in the photosphere below the chromospheric canopy. Signs of…

Solar and Stellar Astrophysics · Physics 2020-01-15 Ada Ortiz , Viggo H. Hansteen , Daniel Nóbrega-Siverio , Luc Rouppe van der Voort