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Related papers: Quiet Sun Ellerman bombs as a possible proxy for r…

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The solar surface is covered by high-speed jets transporting mass and energy into the solar corona and feeding the solar wind. The most prominent of these jets have been known as spicules. However, the mechanism initiating these eruptions…

Solar and Stellar Astrophysics · Physics 2015-06-12 I. N. Kitiashvili , A. G. Kosovichev , S. K. Lele , N. N. Mansour , A. A. Wray

Spicules have often been proposed as substantial contributors toward the mass and energy balance of the solar corona. While their transition region (TR) counterpart has unequivocally been established over the past decade, the observations…

Solar and Stellar Astrophysics · Physics 2025-03-13 Souvik Bose , Jayant Joshi , Paola Testa , Bart De Pontieu

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…

Aims. We study the coherency of solar spicules intensity oscillations with increasing height above the solar limb in quiet Sun, active Sun and active region using observations from HINODE/SOT. Existence of coherency up to transition region…

Solar and Stellar Astrophysics · Physics 2015-07-15 E. Tavabi , A. Ajabshirizadeh , A. R. Ahangarzadeh Maralani , S. Zeighami

Magnetic reconnection is thought to drive a wide variety of dynamic phenomena in the solar atmosphere. Yet the detailed physical mechanisms driving reconnection are difficult to discern in the remote sensing observations that are used to…

Ellerman bombs (EBs) with significant H$\alpha$ wing emissions and ultraviolet bursts (UV bursts) with strong Si IV emissions are two kinds of small transient brightening events that occur in the low solar atmosphere.We numerically…

Solar and Stellar Astrophysics · Physics 2024-02-22 Guanchong Cheng , Lei Ni , Yajie Chen , Jun Lin

Impulsive solar energetic-particle (SEP) events were first distinguished as the streaming electrons that produce type III radio bursts as distinct from shock-induced type II bursts. They were then observed as the surprisingly-enhanced…

Solar and Stellar Astrophysics · Physics 2023-10-30 Donald Reames

Solar winds originate from the Sun and can be classified as fast or slow. Fast solar winds come from coronal holes at the solar poles, while slow solar winds may originate from the equatorial region or streamers. Spicules are jet-like…

Solar and Stellar Astrophysics · Physics 2024-12-25 R. Sadeghi , E. Tavabi

The origin of large-amplitude magnetic field deflections in the solar wind, known as magnetic switchbacks, is still under debate. These structures, which are ubiquitous in the observations made by Parker Solar Probe, likely have their seed…

Solar and Stellar Astrophysics · Physics 2025-01-22 Nina Bizien , Clara Froment , Maria S. Madjarska , Thierry Dudok de Wit , Marco Velli

Understanding electron acceleration associated with magnetic energy release at sub-second scales presents a major challenges in solar physics. Solar radio spikes observed as sub-second, narrow bandwidth bursts with…

Solar and Stellar Astrophysics · Physics 2023-04-06 Daniel L. Clarkson , Eduard P. Kontar , Nicole Vilmer , Mykola Gordovskyy , Xingyao Chen , Nicolina Chrysaphi

Solar type II radio bursts are commonly attributed to coronal shocks driven by coronal mass ejections (CMEs). However, some metric type II bursts have occasionally been reported to occur in the absence of a CME and to be associated with…

Solar and Stellar Astrophysics · Physics 2025-12-23 Yingli Cui , Xiangliang Kong , Zhentong Li , Bing Wang , Yadan Duan , Ze Zhong , Hao Ning , Zhao Wu , Manqing Wang , Yang Liu , Feiyu Yu , Zelong Jiang , Wei Chen , Yang Su , Yao Chen

Solar energetic particles (SEPs) in the small "impulsive" events, primarily accelerated during magnetic reconnection in solar jets, have strong enhancements of the abundances of increasingly heavy elements. In contrast, the shock…

Solar and Stellar Astrophysics · Physics 2024-08-15 Donald V. Reames

Solar energetic particles (SEPs) are an important product of solar activity. They are connected to solar active regions and flares, coronal mass ejections (CMEs), EUV waves, shocks, Type II and III radio emissions, and X-ray bursts. These…

High spatial resolution observation of an emerging flux region (EFR) was done using a vector magnetograph and a H-alpha Lyot filtergraph with Domeless Solar Telescope at Hida Observatory on October 22, 2006. In H-alpha wing images, we could…

Astrophysics · Physics 2015-05-13 H. Watanabe , R. Kitai , K. Okamoto , K. Nishida , J. Kiyohara , S. UeNo , M. Hagino , T. T. Ishii , K. Shibata

The slowly positively drifting bursts (SPDBs) are rarely observed in radio emission of solar flares. To understand how the SPDBs are generated, we studied the radio observations at 600--5000 MHz together with the imaging observations made…

Solar and Stellar Astrophysics · Physics 2024-08-23 Alena Zemanová , Marian Karlický , Jana Kašparová , Jaroslav Dudík , Ján Rybák

Solar type III radio bursts are generated by beams of energetic electrons that travel along open magnetic field lines through the corona and into interplanetary space. However, understanding the source of these electrons and how they escape…

Solar and Stellar Astrophysics · Physics 2023-07-20 Meiqi Wang , Bin Chen , Sijie Yu , Dale E. Gary , Jeongwoo Lee , Haimin Wang , Christina Cohen

Ellerman Bombs (EBs) are often found co-spatial with bipolar photospheric magnetic fields. We use H$\alpha$ imaging spectroscopy along with Fe I 6302.5 \AA\ spectro-polarimetry from the Swedish 1-m Solar Telescope (SST), combined with data…

Solar and Stellar Astrophysics · Physics 2016-05-31 A. Reid , M. Mathioudakis , J. G. Doyle , E. Scullion , V. Henriques , C. Nelson , T. Ray

Advancements in instrumentation have revealed a multitude of small-scale EUV events in the solar atmosphere. Our aim is to employ high-resolution magnetograms to gain a detailed understanding of the magnetic origin of such phenomena. We…

Solar and Stellar Astrophysics · Physics 2024-06-19 D. Nóbrega-Siverio , I. Cabello , S. Bose , L. H. M. Rouppe van der Voort , R. Joshi , C. Froment , V. M. J. Henriques

We investigate the acceleration source of the impulsive solar energetic particle (SEP) events on 2007 January 24. Combining the in situ electron measurements and remote-sensing solar observations, as well as the calculated magnetic fields…

Solar and Stellar Astrophysics · Physics 2013-05-27 C. Li , S. A. Matthews , L. van Driel-Gesztelyi , J. Sun , C. J. Owen

Coronal Jets are transitory small-scale eruptions omnipresent in solar observations. Active regions jets produce significant perturbations on the ambient solar atmosphere and are believed to be generated by microflare reconnection. Multiple…

Solar and Stellar Astrophysics · Physics 2019-03-13 Alin Razvan Paraschiv , Alina Donea