Mechanism by which a celestial body generates a magnetic field
This article is about a proposed theory for the source of a planet's magnetic field. For an explanation of the operation of a mechanical dynamo, see Dynamo.
Illustration of the dynamo mechanism that generates the Earth's magnetic field: convection currents of fluid metal in the Earth's outer core, driven by heat flow from the inner core, organized into rolls by the Coriolis force, generate circulating electric currents, which supports the magnetic field.[1]
In physics, the dynamo theory proposes a mechanism by which a celestial body such as Earth or a star generates a magnetic field. The dynamo theory describes the process through which a rotating, convecting, and electrically conducting fluid can maintain a magnetic field over astronomical time scales. A dynamo is thought to be the source of the Earth's magnetic field and the magnetic fields of Mercury and the Jovian planets.
^"How does the Earth's core generate a magnetic field?". USGS FAQs. United States Geological Survey. Archived from the original on 18 January 2015. Retrieved 21 October 2013.
physics, the dynamotheory proposes a mechanism by which a celestial body such as Earth or a star generates a magnetic field. The dynamotheory describes...
The solar dynamo is a physical process that generates the Sun's magnetic field. It is explained with a variant of the dynamotheory. A naturally occurring...
A dynamo is an electrical generator that creates direct current using a commutator. Dynamos were the first electrical generators capable of delivering...
Houston Dynamo FC (formerly but still commonly called the Houston Dynamo) is an American professional soccer club based in Houston. The Dynamo compete...
debate. Big Bang Chaos theory Classical mechanics Classical field theoryDynamotheory Field theory Ginzburg–Landau theory Kinetic theory of gases Classical...
Virtue theory Physics: Acoustic theory — Antenna theory — Atomic theory — BCS theory — Conformal field theory — Dirac hole theory — Dynamotheory — Landau...
atomic theory, Big Bang theory, Dynamotheory, perturbation theory, theory of relativity (successor to classical mechanics), quantum field theory Earth...
plays a major role in plasma physics and astrophysics, especially in dynamotheory. Maxwell's equations describing the Faraday's and Ampere's laws read:...
magnetized sphere. In the 1940s, Walter M. Elsasser proposed the model of dynamotheory, which attributes Earth's magnetic field to the motion of Earth's iron...
magnetic field is the subject of dynamotheory. When the magnetic Reynolds number is very large, however, diffusion and the dynamo are less of a concern, and...
used to investigate the ancient magnetic fields of those bodies and dynamotheory. Paleomagnetism relies on developments in rock magnetism and overlaps...
solar dynamotheory, are caused within the convective zone of the star. The convective circulation of the conducting plasma functions like a dynamo. This...
the theory of magnetism, an antidynamo theorem is one of several results that restrict the type of magnetic fields that may be produced by dynamo action...
be produced due to the relative movement of the field and the rotor. Dynamotheory Halbach array, a magnetic field that rotates spatially Linear motor...
promoted theory that mass extinctions are caused by massive volcanic episodes Thomas Cowling (English, 1906–1990) – solar magnetic field, dynamotheory Allan...
invariant of the equations. Helicity plays a central role in dynamotheory, the theory of spontaneous generation of magnetic fields in stars and planets...
alloy portion that corresponds to the core of Earth.[citation needed] Dynamotheory suggests that convection in the outer core, combined with the Coriolis...
ISBN 978-0-521-08341-6. White, Marvin L. (1957), "On the atmospheric dynamotheory", Journal of Geophysical Research, 62 (2): 329–330, Bibcode:1957JGR...
Retrieved 6 July 2019. Fitzpatrick, Richard (16 February 2006). "MHD dynamotheory". NASA WMAP. Archived from the original on 27 April 2020. Retrieved...
can be established, e.g., from the exact relation between the theory of kinematic dynamo and STS. The finite-time SEO can be obtained in another, more...
Magnetic helicity – extent to which a magnetic field wraps around itself Dynamotheory – a proposed mechanism for the creation of the Earth's magnetic field...
link For example, The Magnetic Universe: Geophysical and Astrophysical DynamoTheory, Rüdiger and Hollerbach, page 178, Web link Friedhelm Kuypers. Klassische...
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