Results 121 to 130 of about 1,204 (229)

Gravitational Lens Systems to probe Extragalactic Magnetic Fields

, 2008
The Faraday rotation measurements of multiply-imaged gravitational lens systems can be effectively used to probe the existence of large-scale ordered magnetic fields in lensing galaxies and galaxy clusters. The available sample of lens systems appears to suggest the presence of a coherent large-scale magnetic field in giant elliptical galaxies somewhat
Narasimha, D., Chitre, S. M.
openaire   +2 more sources

Constraints on the extragalactic magnetic fields from the NVSS Faraday rotation measures

, 2015
We use rotation measures data from the NVSS catalogue to derive new, statistically robust, upper limits on the strength of extragalactic magnetic fields.
Urban, Federico, Pshirkov, Maxims, Tiniakov, Petr   +2 more
core  

Time Evolution of Primordial Magnetic Fields and Present Day Extragalactic Magnetism

, 2014
The topic of the present thesis is the time evolution of Primordial Magnetic Fields which have been generated in the Early Universe. Assuming this so-called Cosmological Scenario of magnetogenesis to be true, it is shown in the following that this would ...
Saveliev, Andrey
core   +1 more source

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

Conversion of TeV photons in realistic extragalactic magnetic field

, 2018
Very High Energy (TeV) photons can evade absorption by conversion into axion-like (ALPs) particles in the extragalactic magnetic field (EMF). We show that using realistic simulations of the EMF we obtain an even stronger conversion than those obtained with the simplified cell model.
Montanino, D., Vazza, F., Mirizzi, A., Viel, M.   +3 more
openaire   +2 more sources

Large scale magnetic fields of our Galaxy

, 2009
Large-scale magnetic fields in the Galactic disk have been revealed by distributions of pulsar rotation measures (RMs) and Zeeman splitting data of masers in star formation regions, which have several reversals in arm and interarm regions.
JinLin Han
core   +1 more source

Extragalactic Magnetism with SOFIA (SALSA Legacy Program). VII. A Tomographic View of Far-infrared and Radio Polarimetric Observations through MHD Simulations of Galaxies

The Astrophysical Journal
The structure of magnetic fields in galaxies remains poorly constrained, despite the importance of magnetism in the evolution of galaxies. Radio synchrotron and far-infrared (FIR) polarization and polarimetric observations are the best methods to measure
Sergio Martin-Alvarez, Enrique Lopez-Rodriguez, Tara Dacunha, Susan E. Clark, Alejandro S. Borlaff, Rainer Beck, Francisco Rodríguez Montero, Seoyoung L. Jung, Julien Devriendt, Adrianne Slyz, Julia Christine Roman-Duval, Evangelia Ntormousi, Mehrnoosh Tahani, Kandaswamy Subramanian, Daniel A. Dale, Pamela M. Marcum, Konstantinos Tassis, Ignacio del Moral-Castro, Le Ngoc Tram, Matt J. Jarvis   +19 more
doaj   +1 more source

Polarized thermal emission from dust in a galaxy at redshift 2.6. [PDF]

Nature, 2023
Geach JE, Lopez-Rodriguez E, Doherty MJ, Chen J, Ivison RJ, Bendo GJ, Dye S, Coppin KEK.   +7 more
europepmc   +1 more source

CHANG-ES. XXXV. Cosmic Ray Transport and Magnetic Field Structure of NGC 3556 at 3 GHz

The Astrophysical Journal
Radio halos of edge-on galaxies are crucial for investigating cosmic ray propagation and magnetic field structures in galactic environments. We present VLA C-configuration S -band (2–4 GHz) observations of the spiral galaxy NGC 3556, a target from the ...
Jianghui Xu, Yang Yang, Jiang-Tao Li, Guilin Liu, Judith Irwin, Ralf-Jürgen Dettmar, Michael Stein, Theresa Wiegert, Q. Daniel Wang, Jayanne English   +9 more
doaj   +1 more source

Extragalactic Magnetism with SOFIA (Legacy Program) -- I: The magnetic field in the multi-phase interstellar medium of M51 [PDF]

, 2021
Alejandro S. Borlaff, Enrique López-Rodríguez, R. Beck, Rodion Stepanov, Evangelia Ntormousi, Annie Hughes, Konstantinos Tassis, Pamela M. Marcum, Lucas Grosset, J. E. Beckman, Leslie Proudfit, Susan E. Clark, T. Díaz-Santos, Sui Ann Mao, W. T. Reach, Julia Román-Duval, Kandaswamy Subramanian, Le Ngoc Tram, Ellen G. Zweibel, Sofia Legacy Team   +19 more
openalex   +1 more source