Results 91 to 100 of about 24,794 (211)
Testing the reliability of magnetic field strength measurements for M dwarfs
Astronomy & AstrophysicsContext. M dwarfs are known to host strong magnetic fields, which can be measured through several complementary techniques. However, the impact of key methodological choices on Zeeman broadening diagnostics has not been systematically quantified.
Amateis I., Kochukhov O., Hahlin A.
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Astronomy & AstrophysicsRecent asteroseismic observations constitute a great challenge for rotating stellar evolution models, which predict overly fast internal rotation rates when only hydrodynamic processes are included.
Barrère P. +5 more
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Geomagnetism, volcanoes, global climate change, and predictability. A progress report
Annals of Geophysics, 1994 A model is investigated, by which the encounters of the solar system with dense interstellar clouds ought to trigger either geomagnetic field reversals or excursions, that produce extra electric currents within the Earth dynamo, that cause extra Joule's ...
G. P. Gregori
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DYNAMO Team Biennial Report 2016-2017 - Part of ReSoLVE Centre of Excellence
, 2018 Two of the ReSoLVE Centre of Excellence teams operate in Aalto University, DYNAMO team in the School of Science, Department of Computer Science. During the years 2016-2017 the DYNAMO team has continued its efforts towards its main objective, namely to ...
Käpylä, Maarit (editor)
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Nonlinear astrophysical dynamos - Bifurcation of steady dynamos from oscillating dynamos
The Astrophysical Journal, 1978 The nonlinear dynamo wave equation, which has been formulated to explore oscillating dynamos, is found also to have steady magnetic field condfigurations as its stable solutions. The solutions of the nonlinear wave equation, integrated numerically as the initial-boundary-value problem in the rotating spherical geometry, eventually bifurcate into a ...
openaire +1 more source
The Magnetic Helicity Driven Solar-Type Dynamo
Universe(1) Theoretical studies have shown that large-scale vorticity generates a divergent-type helicity flux associated with small-scale magnetic fluctuations.
Valery V. Pipin
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Output Perfomance of dynamo engine [PDF]
, 1989 A ship borne system for electric supply coupled with an electric generator and a drive engine gradually decreases its performance year by year even on continuous careful maintenance and arrangements by marine engineers. While a trouble ratio of the total
Kozuma, Masaru +2 more
core
Scientific ReportsIn this study, we simulate 30,000 years of solar activity using turbulent-alpha (TA) and Babcock–Leighton (BL) mechanisms in a non-kinematic, nonlinear mean field flux-transport solar dynamo model.
Fadil Inceoglu, Rainer Arlt
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A lunar core dynamo limited to the Moon’s first ~140 million years
Communications Earth & EnvironmentSingle crystal paleointensity (SCP) reveals that the Moon lacked a long-lived core dynamo, though mysteries remain. An episodic dynamo, seemingly recorded by some Apollo basalts, is temporally and energetically problematic.
Tinghong Zhou +6 more
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Nonlinearity in Turbulent Diffusion as a Possible Cause of Stellar Flares
AstronomyExtremely powerful flares releasing energy well above 1032 erg are rare compared to the typical manifestations of solar activity, which are already being routinely monitored by the existing Space Weather network—with some level of predictability. However,
Elena Popova
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