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All three components of the current density are required to compute the heating rate due to free magnetic energy dissipation. Here we present a first test of a new model developed to determine if the times of increases in the resistive…

太阳与恒星天体物理 · 物理学 2020-04-29 Michael L. Goodman , Chiman Kwan , Bulent Ayhan , Eric L. Shang

Strong solar flares and coronal mass ejections, here defined not only as the bursts of electromagnetic radiation but as the entire process in which magnetic energy is released through magnetic reconnection and plasma instability, emanate…

太阳与恒星天体物理 · 物理学 2019-05-29 Shin Toriumi , Haimin Wang

Before the onset of a flare is observed in hard X-rays there is often a prolonged pre-flare or pre-heating phase with no detectable hard X-ray emission but pronounced soft X-ray emission suggesting that energy is being released and…

太阳与恒星天体物理 · 物理学 2015-06-19 Marina Battaglia , Lyndsay Fletcher , Paulo J. A. Simões

Context: Solar flares release a large fraction of their energy into non-thermal electrons, but it is not clear where and how. Bremsstrahlung X-rays are observed from the corona and chromosphere. Aims: We aim to characterize the acceleration…

天体物理学 · 物理学 2009-11-11 Marina Battaglia , Arnold O. Benz

Solar flares are transient yet dramatic events in the atmosphere of the Sun, during which a vast amount of magnetic energy is liberated. This energy is subsequently transported through the solar atmosphere or into the heliosphere, and…

太阳与恒星天体物理 · 物理学 2022-12-14 Graham S. Kerr

The ability to predict the occurrence of solar flares in advance is important to humankind due to the potential damage they can cause to Earth's environment and infrastructure. It has been shown in Kusano et al. (2012) that a small-scale…

太阳与恒星天体物理 · 物理学 2022-06-08 Callum Boocock , Kanya Kusano , David Tsiklauri

According to the solar protons' data observed by Geostationary Operational Environmental Satellites (GOES) and neutron monitors on the ground of the Earth, and near-relativistic electrons data measured by the ACE spacecraft, the onset times…

太阳与恒星天体物理 · 物理学 2018-07-25 Ming-Xian Zhao , Gui-Ming Le , Yu-Tian Chi

Context: Transverse loop oscillations and loop contractions are commonly associated with solar flares, but the two types of motion have traditionally been regarded as separate phenomena. Aims: We present an observation of coronal loops…

太阳与恒星天体物理 · 物理学 2015-08-26 Alexander J. B. Russell , Paulos J. A. Simoes , Lyndsay Fletcher

The formation and evolution of active regions is an inherently complex phenomenon. Magnetic fields generated at the base of the convection zone follow a chaotic evolution before reaching the solar surface. In this article, we use a 2-D…

天体物理学 · 物理学 2009-11-07 L. Vlahos , T. Fragos , H. Isliker , M. Georgoulis

The energy released in a solar flare is partitioned between thermal and non-thermal particle energy and lost to thermal conduction and radiation over a broad range of wavelengths. It is difficult to determine the conductive losses and the…

天体物理学 · 物理学 2011-02-11 J. C. Raymond , G. Holman , A. Ciaravella , A. Panasyuk , Y. -K. Ko , J. Kohl

The magnetic field plays a crucial role in heating the solar corona, but the exact energy release mechanism(s) is(are) still unknown. Here, we investigate in detail, the process of magnetic energy release in a situation where two initially…

天体物理学 · 物理学 2009-11-10 K. Galsgaard , C. E. Parnell

Sunquakes observed in the form of expanding wave ripples on the surface of the Sun during solar flares represent packets of acoustic waves excited by flare impacts and traveling through the solar interior. The excitation impacts strongly…

太阳与恒星天体物理 · 物理学 2019-09-04 Alexander G. Kosovichev

Observational aspects of solar flares relevant to the acceleration process of electrons and protons are reviewed and it is shown that most of these observations can be explained by the interaction with flare plasma of a power law energy…

天体物理学 · 物理学 2007-05-23 Vahe Petrosian

The triggering mechanism(s) and critical condition(s) of solar flares are still not completely clarified, although various studies have attempted to elucidate them. We have also proposed a theoretical flare-trigger model based on MHD…

太阳与恒星天体物理 · 物理学 2018-04-04 Yumi Bamba , Kanya Kusano

We present the statistical analysis of 33 flare-related coronal jets, and discuss the link between the jet and the flare properties in these events. We selected jets that were observed between 2010 and 2016 by the Atmospheric Imaging…

太阳与恒星天体物理 · 物理学 2020-02-12 Sophie Musset , Mariana Jeunon , Lindsay Glesener

We investigate the X-ray and UV emission detected by RHESSI and TRACE in the context of a solar flare on the 16th November 2002 with the goal of better understanding the evolution of the flare. We analysed the characteristics of the X-ray…

太阳与恒星天体物理 · 物理学 2015-06-11 Hamish A. S. Reid , Nicole Vilmer , Guillaume Aulanier , Etienne Pariat

Solar energetic transients occurring in solar atmosphere are associated with catastrophic release of energy in the solar corona. These transients inject a part of their energy by various physical processes to the deeper, denser photospheric…

太阳与恒星天体物理 · 物理学 2012-03-16 Ashok Ambastha , Ram Ajor Maurya

\textit{Extreme Ultraviolet Explorer} Deep Survey observations of cool stars (spectral type F to M) have been used to investigate the distribution of coronal flare rates in energy and its relation to activity indicators and rotation…

天体物理学 · 物理学 2015-06-24 Marc Audard , Manuel Guedel , Jeremy J. Drake , Vinay L. Kashyap

Solar flares are due to the catastrophic release of magnetic energy in the Sun's corona, resulting in plasma heating, mass motions, particle acceleration, and radiation emitted from radio to $\gamma$-ray wavelengths. They are associated…

太阳与恒星天体物理 · 物理学 2018-10-16 Dale E. Gary , Timothy S. Bastian , Bin Chen , Gregory D. Fleishman , Lindsay Glesener

Solar flares are known to be prolific electron accelerators, yet identifying the mechanism(s) for such efficient electron acceleration in solar flare (and similar astrophysical settings) presents a major challenge. This is due in part to a…

太阳与恒星天体物理 · 物理学 2023-04-18 Eduard P. Kontar , A. Gordon Emslie , Galina G. Motorina , Brian R. Dennis