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Optimal velocity fields for instantaneous magnetic field growth
arXiv:2508.03573v3 Announce Type: replace Abstract: We consider a variant of the kinematic dynamo problem. Rather than prescribing a velocity field and searching for high-growth magnetic fields via an eigenvalue problem, we treat the seed magnetic-field structure as given and ask which velocity field maximally enhances its instantaneous growth. We show this second problem has an elegant formulation in terms of variational calculus.
Astronomers discover exoplanets with magnetic fields
Astronomers discover exoplanets with magnetic fields WASHINGTON: Based on the behaviour of winds on seven large and hot gas exoplanets, astronomers have obtained the strongest evidence to date that planets beyond our solar system possess magnetic fields, like Earth and five other planets in our solar system. The finding, based on observations by telescopes in Chile and Hawaii, deepens the understanding of exoplanets by showing that at least some share an important characteristic present in...
Most detailed map of the universe's hidden magnetic fields released
Most detailed map of the universe's hidden magnetic fields released Lisa Lock Scientific Editor Andrew Zinin Lead Editor The largest magnetic map of the universe ever produced—five times larger than all previous efforts combined—marks the beginning of a new generation of research into intergalactic magnetism. Magnetic fields influence how galaxies grow, how matter moves through space, and how the universe has evolved over billions of years. The new map was produced by an international team...
'Hot Jupiter' winds blasting at over 15,000 mph reveal 1st evidence of exoplanets with magnetic fields
'Hot Jupiter' winds blasting at over 15,000 mph reveal 1st evidence of exoplanets with magnetic fields "A key step toward ultimately understanding which planets can stay alive, keep their water, and perhaps even, one day, host life as we know it." Astronomers have discovered the first evidence of magnetic fields around planets beyond the solar system, and they did so by studying the worlds' high-speed, violent winds. This marks the first direct measurement of exoplanet magnetic field...
'Totally counterintuitive': Scientists accidentally discover magnetic fields around 7 distant planets, opening new window in the search for life
'Totally counterintuitive': Scientists accidentally discover magnetic fields around 7 distant planets, opening new window in the search for life In an astronomical first, researchers have measured the magnetic fields of seven "hot Jupiter" planets beyond our solar system — adding new clues in the search for alien life. In a first-of-its-kind discovery, astronomers claim they have directly measured the magnetic fields of multiple planets beyond our solar system — potentially providing a...
Magnetic fields may be the secret behind binary star formation
Magnetic fields may be the secret behind binary star formation - Date: - June 5, 2026 - Source: - National Institutes of Natural Sciences - Summary: - Scientists have uncovered a surprising force that may help explain how binary star systems form so quickly. New supercomputer simulations show that magnetic fields surrounding newborn stars can act like a cosmic brake, stripping away angular momentum and allowing two still-forming protostars to spiral closer together instead of drifting apart....
Magnetic field helps binary star systems form, new simulations indicate
Magnetic field helps binary star systems form, new simulations indicate Sadie Harley Scientific Editor Alexander Pol Deputy Editor New simulations show that interactions with a magnetic field can work to decrease the distance between still forming binary protostars. These results can help explain the characteristics of the binary star systems observed in the Milky Way. The results can also be extrapolated to binary black holes, giving insights into how supermassive black holes evolve.
Magnetic field during catalyst synthesis triples ammonia yield
Applying an external magnetic field during the synthesis of CoFe2O4 electrocatalysts triples the ammonia yield during electrocatalytic conversion. The magnetic field alters the surface states of the spinel oxide thin films, making catalytically active sites more accessible. In the journal Advanced Functional Materials, a team led by Marcel Risch at HZB and Sanjay Mathur at University of Cologne demonstrates a scalable strategy for developing next-generation electrocatalysts for efficient and...
How this cosmic map of magnetic fields could help illuminate one of the universe’s most mysterious forces
Light from nearly 4m galaxies measured as it twisted and travelled through intergalactic spaceFollow our Australia news live blog for latest updatesGet our breaking news email, free app or daily news podcastA cosmic map of magnetic fields – the largest ever produced – could help scientists delve into one of the major and most mysterious forces in the universe. A global team led by Australia’s national science agency, the CSIRO charted the magnetic fields by measuring light from nearly 4m...
Exact solution of the two-dimensional (2D) Ising model at an external magnetic field
arXiv:2512.16935v4 Announce Type: replace Abstract: The exact solution of the two-dimensional (2D) Ising model at an external magnetic field is derived by a modified Clifford algebraic approach. At first, the transfer matrices are analyzed in three representations, i.e., Clifford algebraic representation, transfer tensor representation and schematic representation, to inspect nonlocal effects in this many-body interacting system. It is ensured that nontrivial topological structures exist in...