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    magnetic fields tagged posts

    3D Simulations Illuminate Supernova Explosions

    June 4, 2016, Categories  Astronomy/Space

    Magnetohydrodynamic turbulence powered by neutrino-driven convection behind the stalled shock of a core-collapse supernova simulation. This simulation shows that the presence of rotation and weak magnetic fields dramatically impacts the development of the supernova mechanism as compared to non-rotating, non-magnetic stars. The nascent neutron star is just barely visible in the center below the turbulent convection. Credit: Sean M. Couch, Michigan State University

    Magnetohydrodynamic turbulence powered by neutrino-driven convection behind the stalled shock of a core-collapse supernova simulation. This simulation shows that the presence of rotation and weak magnetic fields dramatically impacts the development of the supernova mechanism as compared to non-rotating, non-magnetic stars. The nascent neutron star is just barely visible in the center below the turbulent convection. Credit: Sean M. Couch, Michigan State University

    Michigan State University researchers are using Mira to perform large-scale 3D simulations of the final moments of a supernova’s life cycle...

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    Missing Link found between Turbulence in Collapsing Star and Hypernova, Gamma-ray burst

    November 30, 2015, Categories  Astronomy/Space

    A visualization of the strong, ordered magnetic field built up by dynamo action in the core of a rapidly rotating, collapsed star. Credit: Moesta et al./Nature

    A visualization of the strong, ordered magnetic field built up by dynamo action in the core of a rapidly rotating, collapsed star. Credit: Moesta et al./Nature

    A supercomputer simulation of just 10ms in the collapse of a massive star into a neutron star proves that these catastrophic events, often called hypernovae, can generate the enormous magnetic fields needed to explode the star and fire off bursts of gamma rays visible halfway across the universe.

    The simulation demonstrates that as a rotating star collapses, the star and its attached magnetic field spin faster and faster, forming a dynamo that revs the magnetic field to a million billion times the magnetic field of Earth...

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    Superconductivity in Thin films of MoS2 can Survive under Extremely high Magnetic fields: scientists now have the explanation

    November 24, 2015, Categories  Physics, Technology/Electronics

    a) Maximum magnetic field Bc2 (normalized) at which superconductivity can survive versus temperature T. Filled circles are data taken from MoS2 thin films. Without taking into account internal magnetic fields generated by the lattice structure of MoS2, Bc2 cannot exceed 1. b) Taking into account the internal magnetic fields, the experimental data can be well explained theoretically. Credit: The Physics Department, HKUST

    a) Maximum magnetic field Bc2 (normalized) at which superconductivity can survive versus temperature T. Filled circles are data taken from MoS2 thin films. Without taking into account internal magnetic fields generated by the lattice structure of MoS2, Bc2 cannot exceed 1. b) Taking into account the internal magnetic fields, the experimental data can be well explained theoretically. Credit: The Physics Department, HKUST

    Superconductivity is a fascinating quantum phenomenon in which electrons form pairs and flow with 0 resistance. However, strong enough magnetic field can break electron pairs and destroy superconductivity. Surprisingly, experimental groups led by Prof. Ye and Prof...

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    Astronomers have for the 1st time probed the Magnetic fields in the Mysterious Inner regions of Stars

    October 23, 2015, Categories  Astronomy/Space

    Artistic representation (not to scale) of a red giant star with strong internal magnetic fields. Waves propagating through the star become trapped within the stellar core when a strong magnetic field is present, producing a "magnetic greenhouse effect" that reduces the observed amplitude of stellar pulsations. Credit: Rafael A. García (SAp CEA), Kyle Augustson (HAO), Jim Fuller (Caltech) & Gabriel Pérez (SMM, IAC), Photograph from AIA/SDO

    Artistic representation (not to scale) of a red giant star with strong internal magnetic fields. Waves propagating through the star become trapped within the stellar core when a strong magnetic field is present, producing a “magnetic greenhouse effect” that reduces the observed amplitude of stellar pulsations. Credit: Rafael A. García (SAp CEA), Kyle Augustson (HAO), Jim Fuller (Caltech) & Gabriel Pérez (SMM, IAC), Photograph from AIA/SDO

    Using asteroseismology, which uses sound waves generated by turbulence on the surface of stars to determine their inner properties scientists found the fusion-powered cores of red giants, stars that are evolved versions of our sun, are strongly magnetized. The findings will help astronomers better understand the evolution of stars.

    “In the same way medi...

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