Results 61 to 70 of about 372,553 (214)
Magnetic fields in galaxies [PDF]
Proceedings of the International Astronomical Union, 2005 AbstractThe origin and evolution of magnetic fields in the Universe is a cosmological problem. Although exotic mechanisms for magneotgenesis cannot be ruled out, galactic magnetic fields could have been seeded by magnetic fields from stars and accretion disks, and must be continuously regenerated due to the ongoing replacement of the interstellar ...
openaire +1 more source
Magnetorotational Instability in a Solar Near-surface Mean-field Dynamo
The Astrophysical JournalWe address the question whether the magnetorotational instability (MRI) can operate in the near-surface shear layer (NSSL) of the Sun and how it affects the interaction with the dynamo process.
Axel Brandenburg +3 more
doaj +1 more source
The Role of Magnetic Fields in AGN Activity and Feedback [PDF]
, 2018 Active galactic nuclei (AGNs), the luminous, compact core regions of galaxies where accretion occurs onto supermassive black holes, can dramatically influence their entire host galaxy evolution by a process referred to as AGN feedback. Energy feedback to
Keppens, R. +4 more
core
Adaptive Gaussian Markov Random Fields with Applications in Human Brain Mapping [PDF]
, 2005 Functional magnetic resonance imaging (fMRI) has become the standard technology in human brain mapping. Analyses of the massive spatio-temporal fMRI data sets often focus on parametric or nonparametric modeling of the temporal component, while spatial ...
Brezger, Andreas +2 more
core +1 more source
Magnetically Assisted Vorticity Production in Decaying Acoustic Turbulence
The Astrophysical JournalWe study vorticity production in isothermal, subsonic, acoustic (nonvortical), and decaying turbulence due to the presence of magnetic fields. Using three-dimensional numerical simulations, we find that the resulting kinetic energy cascade follows the ...
Axel Brandenburg, Evan Scannapieco
doaj +1 more source
Cio-cio-san no Yūutsu: memoirs of magnetogenesis and Turbulent Dynamo Theory [PDF]
, 2013 The origins of cosmic magnetic fields are not as yet well understood. In this dissertation we investigate, via direct numerical simulation, the temporal evolution and behaviour of magnetic fields that are generated from absolute zero initial conditions ...
Adams, Patrick
core
Stability of Magnetic Fluids in Magnetic Fields [PDF]
Журнал нано- та електронної фізики, 2014 Stability of magnetic fluids in magnetic fields is one of the major factors determining the possibility of their practical use and resource of their exploitation.
I.M. Arefyev, T.A. Arefyeva
doaj
Demo 19-09 Magnetic Fields Around Currents [PDF]
, 2001 The magnetic field around various geometries of conductors can be observed using iron filings. While the current is running through the wire, iron filings are sprinkled onto a plastic sheet through which the wire runs, and the plate is gently tapped ...
core
Proposed Resolution to the Solar Open Magnetic Flux Problem
The Astrophysical JournalThe solar magnetic fields emerging from the photosphere into the chromosphere and corona are comprised of a combination of closed (field lines with both ends rooted at the Sun) and open (field lines with only one end at the Sun) fields.
C. Nick Arge +4 more
doaj +1 more source
Magnetised CGM gas at z ∼ 1 revealed by SPICE-RACS
Astronomy & AstrophysicsMagnetic fields are expected to permeate the circumgalactic medium (CGM) of galaxies, but direct constraints at high redshift remain limited by the lack of high-quality Faraday rotation measure (RM) data.
Malik Sunil +19 more
doaj +1 more source