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Related papers: Alfv\'en Waves in Solar Flares

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Alfv\'{e}n waves as excited in black hole accretion disks and neutron star magnetospheres are the building blocks of turbulence in relativistic, magnetized plasmas. A large reservoir of magnetic energy is available in these systems, such…

High Energy Astrophysical Phenomena · Physics 2021-11-17 B. Ripperda , J. F. Mahlmann , A. Chernoglazov , J. M. TenBarge , E. R. Most , J. Juno , Y. Yuan , A. A. Philippov , A. Bhattacharjee

The issue of predicting solar flares is one of the most fundamental in physics, addressing issues of plasma physics, high-energy physics, and modelling of complex systems. It also poses societal consequences, with our ever-increasing need…

Solar and Stellar Astrophysics · Physics 2014-11-20 R. T. James McAteer , Peter T. Gallagher , Paul A. Conlon

Torsional Alfv\'en waves are promising candidates for transport of energy across different layers of the solar atmosphere and have been theoretically predicted for decades. Previous detections of Alfv\'en waves so far have however mostly…

Solar and Stellar Astrophysics · Physics 2020-01-15 P. Kohutova , E. Verwichte , C. Froment

Static distributions of temperature and wind velocity at the transition region are calculated within the framework of magnetohydrodynamics (MHD) of completely ionized hydrogen plasma. The numerical solution of the derived equations gives…

The solar wind is the extension of the Sun's hot and ionized corona, and it exists in a state of continuous expansion into interplanetary space. The radial distance at which the wind's outflow speed exceeds the phase speed of Alfvenic and…

We make use of the Parker Solar Probe (PSP) data to explore the nature of solar wind turbulence focusing on the Alfv\'enic character and power spectra of the fluctuations and their dependence on distance and context (i.e. large scale solar…

Plasma ions heating (especially minor heavy ions preferential heating) in fast solar wind and solar corona is an open question in space physics. However, Alfv\'en waves have been always considered as a candidate of energy source for corona…

Plasma Physics · Physics 2021-08-17 Peng He

Motivated by theoretical, numerical, and observational evidence, we explore the possibility that the critical transition between sub-Alfv\'enic flow and super-Alfv\'enic flow in the solar atmosphere takes place in fragmented and…

Solar and Stellar Astrophysics · Physics 2022-11-23 Rohit Chhiber , William H. Matthaeus , Arcadi V. Usmanov , Riddhi Bandyopadhyay , Melvyn L. Goldstein

Spectroscopic observations of a solar limb flare recorded by SUMER on SOHO reveal, for the first time, hot fast magnetic reconnection outflows in the corona. As the reconnection site rises across the SUMER spectrometer slit, significant…

Astrophysics · Physics 2018-06-19 Tongjiang Wang , Linhui Sui , Jiong Qiu

Solar photospheric convection drives myriads of dissipative Alfven solitons (hereinafter called alfvenons) capable of accelerating electrons and ions to energies of hundreds of keV and producing the X-ray corona. Alfvenons are exact…

Astrophysics · Physics 2009-09-29 K. Stasiewicz

Magnetic reconnection in the solar corona is thought to be unstable to the formation of multiple interacting plasmoids, and previous studies have shown that plasmoid dynamics can trigger MHD waves of different modes propagating outward from…

Solar and Stellar Astrophysics · Physics 2018-10-25 Elena Provornikova , J. Martin Laming , Vyacheslav S. Lukin

Although the mechanisms responsible for heating the Sun's corona and accelerating the solar wind are still being actively investigated, it is largely accepted that photospheric motions provide the energy source and that the magnetic field…

Solar and Stellar Astrophysics · Physics 2015-06-18 Roberto Lionello , Marco Velli , Cooper Downs , Jon A. Linker , Zoran Mikić , Andrea Verdini

We present an updated global model of the solar corona, including the transition region. We simulate the realistic tree-dimensional (3D) magnetic field using the data from the photospheric magnetic field measurements and assume the…

Alfv\'en waves are primal and pervasive in space plasmas and significantly contributes to microscale fluctuations in the solar wind and some heliospheric processes. Here, we demonstrate the first observable distinct feature of Alfv\'en wave…

Space Physics · Physics 2018-10-16 Anil N. Raghav , Ankita Kule

Alfv\'enic waves are thought to play an important role in coronal heating and acceleration of solar wind. Here we investigated the statistical properties of Alfv\'enic waves along spicules (jets that protrude into the corona) in a polar…

Solar and Stellar Astrophysics · Physics 2015-05-28 Takenori J. Okamoto , Bart De Pontieu

We perform numerical simulations of impulsively generated Alfv\'en waves in an isolated photospheric flux tube, and explore the propagation of these waves along such magnetic structure that extends from the photosphere, where these waves…

Solar and Stellar Astrophysics · Physics 2015-05-15 K. Murawski , A. K. Srivastava , Z. E. Musielak , B. N. Dwivedi

Magnetic reconnection changes the magnetic field topology and powers explosive events in astrophysical, space and laboratory plasmas. For flares and coronal mass ejections (CMEs) in the solar atmosphere, the standard model predicts the…

Solar and Stellar Astrophysics · Physics 2010-10-11 Rui Liu , Jeongwoo Lee , Tongjiang Wang , Guillermo Stenborg , Chang Liu , Haimin Wang

The paper is dedicated to the anniversary of the discovery of Alfv\'en waves. The concept of Alfv\'en waves has played an outstanding role in the formation and development of cosmical electrodynamics. A distinctive feature of Alfv\'en waves…

Geophysics · Physics 2022-04-28 A. V. Guglielmi , B. I. Klain , A. S. Potapov

Magnetohydronamic turbulence is believed to play a crucial role in heating the laboratorial, space, and astrophysical plasmas. However, the precise connection between the turbulent fluctuations and the particle kinetics has not yet been…

Solar and Stellar Astrophysics · Physics 2015-11-11 Jiansen He , Chuanyi Tu , Eckart Marsch , Christopher H. K. Chen , Linghua Wang , Zhongtian Pei , Lei Zhang , Chadi S. Salem , Stuart D. Bale

Magnetic reconnection plays a crucial role in violent energy conversion occurring in the environments of high electrical conductivity, such as the solar atmosphere, magnetosphere, and fusion devices. We focus on the morphological features…

Astrophysics · Physics 2009-11-13 J. Lin , S. R. Cranmer , C. J. Farrugia
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