• Thumbnail for Alfvén wave
    such as kinetic and inertial Alfvén waves emerge in certain plasma regimes. The characteristic speed of these waves—the Alfvén velocity—depends on the magnetic...
    35 KB (4,475 words) - 14:14, 26 June 2025
  • Thumbnail for Hannes Alfvén
    The writer was Inger Alfvén and is well known for her work in Sweden. The composer Hugo Alfvén was Hannes Alfvén's uncle. Alfvén studied the history of...
    29 KB (2,555 words) - 17:04, 30 May 2025
  • isotropically with the Alfvén speed, ω2 f = k2v2 A. In this limit, the fast mode is sometimes referred to as a compressional Alfvén wave. When the wavevector...
    14 KB (2,198 words) - 13:47, 24 May 2025
  • Thumbnail for Wave
    field equation Alfvén wave, in plasma physics Atmospheric wave, a periodic disturbance in the fields of atmospheric variables Fir wave, a forest configuration...
    61 KB (7,810 words) - 01:40, 29 June 2025
  • Thumbnail for Sun
    to the radially decreasing Alfvén wave phase speed. This defines a closed, nonspherical surface, referred to as the Alfvén critical surface, below which...
    173 KB (19,378 words) - 23:39, 6 July 2025
  • Thumbnail for Stellar corona
    coronal holes. The Alfvén surface is the boundary separating the corona from the solar wind defined as where the coronal plasma's Alfvén speed and the large-scale...
    62 KB (7,712 words) - 02:41, 19 June 2025
  • Thumbnail for Magnetohydrodynamics
    what are now referred to as Alfvén waves. Alfvén initially referred to these waves as "electromagnetic–hydrodynamic waves"; however, in a later paper...
    44 KB (5,347 words) - 00:44, 19 June 2025
  • local Alfvén speed. It is used in plasma physics, where it is analogous to the Mach number but based on Alfvén waves rather than sound waves. Alfvén and...
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  • Triepcke Krøyer Alfvén (1867–1940), commonly known as Marie Krøyer, Danish painter, wife of Hugo Alfvén wave, a type of magnetohydrodynamic wave, named after...
    544 bytes (96 words) - 10:41, 24 August 2021
  • Thumbnail for Akira Hasegawa
    kinetic Alfvén wave. Hasegawa and Chen introduced the concept of the kinetic Alfven wave to illustrate the microscopic process of the Alfven wave heating...
    28 KB (3,197 words) - 21:02, 8 July 2025
  • {\displaystyle v_{s}} - plasma "sound" speed, v A {\displaystyle v_{A}} - plasma Alfvén speed (The subscript 0 denotes the static part of the electric or magnetic...
    6 KB (489 words) - 04:01, 19 March 2025
  • magnetic Reynolds numbers. It is named after Hannes Alfvén, who put the idea forward in 1943. Alfvén's theorem implies that the magnetic topology of a fluid...
    19 KB (2,669 words) - 09:42, 24 May 2025
  • Thumbnail for Liu Chen (physicist)
    heating via resonant absorption within Alfvén wave continuous spectrum. They discovered the Kinetic Alfvén wave, which resolves the logarithmic singularity...
    15 KB (1,475 words) - 13:05, 23 November 2024
  • Thumbnail for Magnetic reconnection
    reconnection involves plasma flows at a substantial fraction of the Alfvén wave speed, which is the fundamental speed for mechanical information flow...
    42 KB (5,491 words) - 18:44, 22 May 2025
  • the relative importance depending on parameters. Waves in plasmas Sound Alfvén wave Magnetosonic wave Various patents and articles related to fusion, IEC...
    10 KB (2,461 words) - 09:51, 22 May 2025
  • Thumbnail for Tsunami
    Tsunami (redirect from Tsunami wave train)
    (t)soo-NAH-mee, (t)suu-; from Japanese: 津波, lit. 'harbour wave', pronounced [tsɯnami]) is a series of waves in a water body caused by the displacement of a large...
    67 KB (7,769 words) - 09:16, 9 July 2025
  • Thumbnail for Solar wind
    expeditions. The Alfvén surface is the boundary separating the corona from the solar wind defined as where the coronal plasma's Alfvén speed and the large-scale...
    57 KB (6,718 words) - 12:33, 29 May 2025
  • are equal. It is named after Hannes Alfvén, and is also called Alfvén critical surface, Alfvén point, or Alfvén radius. In 2018, the Parker Solar Probe...
    15 KB (1,570 words) - 03:08, 16 June 2025
  • Thumbnail for Seismic wave
    A seismic wave is a mechanical wave of acoustic energy that travels through the Earth or another planetary body. It can result from an earthquake (or...
    21 KB (2,383 words) - 16:31, 3 July 2025
  • Thumbnail for Galaxy formation and evolution
    Thomas, T; Pfrommer, C (25 January 2019). "Cosmic-ray hydrodynamics: Alfvén-wave regulated transport of cosmic rays". Monthly Notices of the Royal Astronomical...
    46 KB (5,616 words) - 16:45, 7 July 2025
  • Thumbnail for Aurora
    auroral features are also created by electrons accelerated by dispersive Alfvén waves. At small wavelengths, transverse to the background magnetic field (comparable...
    116 KB (12,896 words) - 14:50, 24 June 2025
  • This is a list of wave topics. Contents:  Top 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z...
    11 KB (37 words) - 22:14, 6 March 2025
  • so-called Alfvén wave, a physical principle within magnetohydrodynamics that was described first in 1942 by the later Nobel Prize winner Hannes Alfvén and which...
    8 KB (1,128 words) - 10:59, 3 May 2023
  • Thumbnail for Interstellar medium
    provides wave modes such as Alfvén waves which are often faster than pure sound waves: if turbulent speeds are supersonic but below the Alfvén wave speed...
    60 KB (7,341 words) - 19:05, 15 March 2025
  • where c s {\displaystyle c_{s}} is the speed of the ion acoustic wave (or the Alfvén wave, if the magnetic pressure is higher than the plasma pressure)....
    45 KB (8,271 words) - 23:35, 21 June 2025
  • Thumbnail for Marie Krøyer
    composer Hugo Alfvén who had also been taken by her beauty. The couple had a child, Marie divorced Krøyer and moved to Sweden with Alfvén. They married...
    23 KB (2,872 words) - 12:18, 9 November 2024
  • Thumbnail for Large Plasma Device
    micrometres. Importantly, it also implies that the Alfvén wavelength is a few meters, and in fact shear Alfvén waves are routinely observed in the LAPD. This is...
    12 KB (1,665 words) - 05:07, 8 May 2024
  • Thumbnail for Magnetic pressure
    stress tensor Electromagnetically induced acoustic noise and vibration Alfvén wave Bellan, Paul Murray (2006). Fundamentals of Plasma Physics. Cambridge:...
    6 KB (844 words) - 22:10, 18 October 2024
  • bursts) and ultraviolet (UV) spectra. Alfvén wave Magnetohydrodynamics Moreton wave Rankine–Hugoniot conditions Shock wave H. E. Petschek, Magnetic Field Annihilation...
    11 KB (1,720 words) - 17:46, 26 November 2023
  • timescale of an Alfvén wave crossing to the timescale of resistive diffusion. It is a special case of the magnetic Reynolds number when the Alfvén velocity is...
    1 KB (184 words) - 07:40, 29 December 2024