Results 121 to 130 of about 3,416 (224)

Galactic Magnetic Fields. I. Theoretical Model and Scaling Relations

The Astrophysical Journal
Galactic dynamo models have generally relied on input parameters that are very challenging to constrain. We address this problem by developing a model that uses observable quantities as input: the galaxy rotation curve, the surface densities of the gas ...
Luke Chamandy, Rion Glenn Nazareth, Gayathri Santhosh   +2 more
doaj   +1 more source

The MeerKAT Fornax Survey

Astronomy & Astrophysics
Large-scale magnetic fields in galaxy clusters can influence their physics and the evolution of cluster-embedded galaxies. These properties remain poorly constrained due to a historical lack of high-sensitivity and high-resolution spectropolarimetric ...
Loi F., Murgia M., Govoni F., Serra P., Vacca V., Maccagni F. M., Kamphuis P., Kleiner D.   +7 more
doaj   +1 more source

SPH simulations of magnetic fields in galaxy clusters

, 1998
We perform cosmological, hydrodynamic simulations of magnetic fields in galaxy clusters. The computational code combines the special-purpose hardware Grape for calculating gravitational interaction, and smooth-particle hydrodynamics for the gas component.
Lesch, H. (Muenchen Univ. (Germany). Inst. fuer Astronomie und Astrophysik mit Universitaets-Sternwarte), Dolag, K., Bartelmann, M. (Max-Planck-Institut fuer Astrophysik, Garching (Germany)), Max-Planck-Institut fuer Astrophysik, Garching (Germany)   +3 more
core  

The First Magnetic Fields

, 2011
We review current ideas on the origin of galactic and extragalactic magnetic fields. We begin by summarizing observations of magnetic fields at cosmological redshifts and on cosmological scales.
Rudolf A. Treumann, Schleicher, Dominik R. G., Subramanian, Kandaswamy, Lawrence M. Widrow, Dominik R. G. Schleicher, Widrow, Lawrence M., Kandaswamy Subramanian, Christos G. Tsagas, Ryu, Dongsu, Tsagas, Christos G., Dongsu Ryu, Treumann, Rudolf A.   +11 more
core   +1 more source

A Pioneering Experiment Combining Single-antenna and Aperture-synthesis Data to Measure Faraday Rotation with GMIMS and the CGPS

The Astronomical Journal
Structures in the magnetoionic medium exist across a wide range of angular sizes owing to large-scale magnetic fields coherent over the Galactic spiral arms combined with small-scale fluctuations in the magnetic field and electron density resulting from ...
Anna Ordog, Jo-Anne C. Brown, T. L. Landecker, Alex S. Hill, Roland Kothes, Jennifer L. West, John M. Dickey, Marijke Haverkorn, Ettore Carretti, Alec J. M. Thomson, Andrea Bracco, D. A. Del Rizzo, Ryan R. Ransom, Robert I. Reid   +13 more
doaj   +1 more source

Origin of the Magnetic Field of the Galaxy

The Astrophysical Journal, 1969
Galactic magnetic field origin from galactic turbulence, calculating individual Fourier components in random turbulent ...
openaire   +1 more source

Astrophysical Magnetic Fields and Topics in Galaxy Formation

, 1997
The grant was used to support theoretical research on a variety of astro-physical topics falling broadly into those described by the proposal: galaxy formation, astrophysical magnetic fields, magnetized accretion disks in AGN, new physics, and other ...
Field, George B.
core  

Disentangling Magnetic Fields in NGC 6946 with Wide-band Polarimetry

The Astrophysical Journal
We present λ 13 cm polarization observations of the nearby spiral galaxy NGC 6946 with the Westerbork Synthesis Radio Telescope (WSRT) to examine the nearside halo magnetic fields. Despite λ 13 cm exhibiting similar two-dimensional morphology as observed
A. L. Williams, G. Heald, E. M. Wilcots, E. G. Zweibel   +3 more
doaj   +1 more source

Magnetic fields in nearby galaxies

, 2011
14 pages, 4 figures, 2 tables. Review paper published in: "The dynamic interstellar medium: a celebration of the Canadian Galactic Plane Survey", 2010, Eds. R. Kothes, T.L. Landecker & A.G.
openaire   +2 more sources

Interstellar Polarization Survey. V. Galactic Magnetic Field Tomography of the Spiral Arms Using Optical and Near-infrared Starlight Polarization

The Astronomical Journal
Interstellar linear polarization occurs when starlight passes through elongated dust grains aligned by interstellar magnetic fields. The observed polarization can come from different dust structures along the line of sight (LOS).
Y. Angarita, M. J. F. Versteeg, M. Haverkorn, V. Pelgrims, C. V. Rodrigues, A. M. Magalhães, R. Santos-Lima, Koji S. Kawabata   +7 more
doaj   +1 more source