Results 101 to 110 of about 3,496,469 (217)

Evolution of Magnetic Field of the Quasar 1604+159 at parsec Scale

The Astrophysical Journal
We have analyzed the total intensity, spectral index, linear polarization, and rotation measure (RM) distributions at the parsec scale for the quasar 1604+159.
Xu-Zhi Hu, Xiaoyu Hong, Wei Zhao, Liang Chen, Wei-Yang Wang, Linhui Wu   +5 more
doaj   +1 more source

DEFROST: Detecting Excess in Faraday Rotation thrOugh Sophisticated analysis Techniques

Astronomy & Astrophysics
Aims. Understanding the origin and evolution of cosmological magnetic fields requires a detailed knowledge of the strength of magnetic fields in different extragalactic environments.
Vacca Valentina, Hutschenreuter Sebastian, Cabriolu Andrea, Enßlin Torsten A., Roth Jakob, Reineke Martin, Frank Philipp, Govoni Federica, Murgia Matteo, Fenu Gianni   +9 more
doaj   +1 more source

Primordial magnetic fields

We discuss here the following questions related to magnetic fields in the early universe: 1. Observational constraints on primordial magnetic fields. 2.
Shaposhnikov, M.
core   +1 more source

Toward Cosmological Simulations of the Magnetized Intracluster Medium with Resolved Coulomb Collision Scale

The Astrophysical Journal
We present the first results of one extremely high-resolution, nonradiative magnetohydrodynamical cosmological zoom-in simulation of a massive cluster with a virial mass of  M _vir = 2.0 × 10 ^15 solar masses. We adopt a mass resolution of 4 × 10 ^5 M _⊙
Ulrich P. Steinwandel, Klaus Dolag, Ludwig M. Böss, Tirso Marin-Gilabert   +3 more
doaj   +1 more source

The topology of the magnetic field in Abell 2255 out to its virial radius

Astronomy & Astrophysics
We present the LOFAR Galaxy Cluster Ultra-Deep Field, in which 336 h of LOFAR observations at 120–168 MHz have been collected on the nearby (z = 0.080) cluster Abell 2255.
Botteon A., van Weeren R. J., Hu Y., Vazza F., Brunetti G., Rajpurohit K., Lazarian A., Shimwell T. W., De Rubeis E., Balboni M., Bonafede A., Cassano R., Di Gennaro G., Gastaldello F., Hardcastle M. J., Ignesti A., Röttgering H. J. A.   +16 more
doaj   +1 more source

Tracing Magnetic Field in Super-Alfvénic Turbulence with Gradient Technique

The Astrophysical Journal
Super-Alfvénic turbulence is important for many astrophysical objects, particularly galaxy clusters. In this paper, we explore the accuracy of synchrotron intensity gradients and X-ray intensity gradients to map magnetic fields in super-Alfvénic ...
Ka Wai Ho, A. Lazarian
doaj   +1 more source

Magnetic Field of the Quasar 1604+159 from Parsec to Kiloparsec Scale

The Astrophysical Journal
We present a multifrequency polarimetric study for the quasar 1604+159. The source was observed at the L band with the American Very Long Baseline Array and the L , X , and U bands with the Very Large Array.
Xu-Zhi Hu, Xiaoyu Hong, Wei Zhao, Liang Chen, Wei-Yang Wang, Linhui Wu   +5 more
doaj   +1 more source

Observations of magnetic fields in intracluster medium [PDF]

, 2015
The presence of μG-level magnetic fields associated with the intracluster medium of galaxy clusters is now widely acknowledged. Our knowledge of their properties has greatly improved in the recent years thanks to both new radio observations and the ...
GOVONI, FEDERICA
core   +1 more source

The Coherent Magnetic Field of the Milky Way

The Astrophysical Journal
We present a suite of models of the coherent magnetic field of the Galaxy based on new divergence-free parametric functions describing the global structure of the field.
Michael Unger, Glennys R. Farrar
doaj   +1 more source

Optical polarimetry studies of Seyfert galaxies [PDF]

, 1999
Optical imaging polarimetry has been performed on seven nearby Seyfert galaxies, three with face-on and four with edge-on host galaxies of various morphological classifications.
Felton, Michelle Ann
core