Results 11 to 20 of about 19,051 (197)

Origin of galactic and extragalactic magnetic fields [PDF]

Reviews of Modern Physics, 2002
67 pages, 17 figures, accepted for publication in Reviews of Modern ...
Lawrence M Widrow
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Cosmic Rays in Galactic and Extragalactic Magnetic Fields [PDF]

Space Science Reviews, 2011
We briefly review sources of cosmic rays, their composition and spectra as well as their propagation in the galactic and extragalactic magnetic fields, both regular and fluctuating. A special attention is paid to the recent results of the X-ray and gamma-ray observations that shed light on the origin of the galactic cosmic rays and the challenging ...
Aharonian, Felix, Bykov, Andrei, Parizot, E., Ptuskin, Vladimir, Watson, Alan   +4 more
openaire   +7 more sources

The redshift evolution of extragalactic magnetic fields

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACTFaraday rotation studies of distant radio sources can constrain the evolution and the origin of cosmic magnetism. We use data from the LOFAR Two-Metre Sky Survey: Data Release 2 (LoTSS DR2) to study the dependence of the Faraday rotation measure (RM) on redshift.
V P Pomakov, S P O’Sullivan, M Brüggen, F Vazza, E Carretti, G H Heald, C Horellou, T Shimwell, A Shulevski, T Vernstrom   +9 more
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Core shifts, magnetic fields and magnetization of extragalactic jets [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We study the effect of radio-jet core shift, which is a dependence of the position of the jet radio core on the observational frequency. We derive a new method of measuring the jet magnetic field based on both the value of the shift and the observed radio flux, which complements the standard method that assumes equipartition.
Zdziarski, Andrzej A., Sikora, Marek, Pjanka, Patryk, Tchekhovskoy, Alexander   +3 more
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Inhomogeneous extragalactic magnetic fields and the second knee in the cosmic ray spectrum

Physical Review D, 2008
Various experiments indicate the existence of a second knee around energy E=3.10^{17} eV in the cosmic ray spectrum. This feature could be the signature of the end of the galactic component and of the emergence of the extragalactic one, provided that the
Kotera, Kumiko, Lemoine, Martin
core   +4 more sources

Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars [PDF]

Science, 2010
On the Origins of Magnetism The magnetic fields in galaxies and galaxy clusters are thought to result from the amplification of weak primordial magnetic fields, which, according to one class of theories, should exist in the voids between galaxies and galaxy clusters. Neronov and Vovk (p. 73
Neronov Andrii, Vovk Ievgen
openaire   +5 more sources

The First Magnetic Fields

Space Science Reviews, 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.
A. Brandenburg, A. Kosowsky, A. Lazarian, A. Lewis, A. Mack, A. Neronov, A. Rebhan, A. Yahil, A.A. Starobinskii, A.H. Guth, A.J. Keane, B. Cheng, B. Himmetoglu, B. Himmetoglu, B. Ratra, B. Schenke, B.D. Fried, C. Bonvin, C. Caprini, C. Pinto, C. Pinto, C.D. Dermer, C.G. Tsagas, C.G. Tsagas, C.G. Tsagas, C.J. Hogan, C.L. Carilli, Christos G. Tsagas, D. Grasso, D.G. Yamazaki, D.H. Lyth, D.R.G. Schleicher, D.R.G. Schleicher, D.R.G. Schleicher, D.T. Son, Dominik R. G. Schleicher, Dongsu Ryu, E. Fenu, E. Weibel, E.-J. Kim, E.W. Kolb, F. Finelli, F. Hoyle, F. Hoyle, G. Davies, G. Sigl, G.B. Field, H. Maki, H. Stefani, H. Tashiro, H. Tashiro, H. Xu, I. Brown, J. Adamek, J. Adams, J. Martin, J. Silk, J. Silk, J.-P. Blaizot, J.A. Peacock, J.A. Quashnock, J.C. Tan, J.D. Barrow, J.D. Barrow, J.D. Barrow, J.D. Jackson, J.M. Cornwall, J.R. Shaw, K. Ichiki, K. Jedamzik, K. Jedamzik, K. Subramanian, K. Subramanian, K. Subramanian, K. Subramanian, K. Subramanian, K. Subramanian, K. Subramanian, K. Takahashi, K. Thorne, K.-T. Kim, Kandaswamy Subramanian, L. Biermann, L.F.S. Rodrigues, L.M. Widrow, Lawrence M. Widrow, M. Ando, M. Christensson, M. Gasperini, M. Giovannini, M. Langer, M. Strickland, M. Strickland, M.A. Stenrup, M.J. Rees, M.J. Rees, M.L. Bernet, M.N. Machida, M.S. Turner, M.V. Penston, N.Y. Gnedin, P. Anninos, P. Arnold, P. Arnold, P. Arnold, P. Arnold, P. Arnold, P. Hennebelle, P. Hennebelle, P. Romatschke, P.J. Greenberg, P.J.E. Peebles, P.J.E. Peebles, P.P. Kronberg, P.P. Kronberg, P.P. Kronberg, R. Banerjee, R. Banerjee, R. Banerjee, R. Durrer, R. Durrer, R. Durrer, R. Durrer, R.-G. Cai, R.A. Daly, R.B. Larson, R.E. Pudritz, R.M. Athreya, R.M. Kulsrud, R.M. Kulsrud, Rudolf A. Treumann, S. Bethke, S. Seager, S. Sur, S.C.O. Glover, S.D.M. White, S.I. Syrovatskii, S.K. Sethi, S.W. Hawking, St. Mrówczyński, St. Mrówczyński, T. Abel, T. Abel, T. Kahniashvili, T. Vachaspati, T.R. Seshadri, T.R. Seshadri, U. Frisch, V. Bromm, V. Demozzi, Ya.B. Zel’dovich, Yu.E. Pokrovsky   +151 more
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Proton Acceleration with Relativistic Electromagnetic Shock. [PDF]

Adv Sci (Weinh)
New Ion Acceleration Mechanism! A novel cosmic‐ray proton acceleration mechanism is proposed, where relativistic electromagnetic shocks accelerate protons transversely. Hamiltonian analysis yields a scaling law linking the proton energy to the minimum longitudinal thickness of the shock.
Xiao T, Zhang X, Kong F, Zheng X, Gong Z, Shen B.   +5 more
europepmc   +2 more sources

Deep Synoptic Array Science: Implications of Faraday Rotation Measures of Fast Radio Bursts Localized to Host Galaxies

The Astrophysical Journal Letters, 2023
Faraday rotation measures (RMs) of fast radio bursts (FRBs) offer the prospect of directly measuring extragalactic magnetic fields. We present an analysis of the RMs of 10 as yet nonrepeating FRBs detected and localized to host galaxies with robust ...
Myles B. Sherman, Liam Connor, Vikram Ravi, Casey Law, Ge Chen, Kritti Sharma, Morgan Catha, Jakob T. Faber, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Rick Hobbs, David Hodge, Mark Hodges, James W. Lamb, Paul Rasmussen, Jun Shi, Dana Simard, Jean Somalwar, Reynier Squillace, Sander Weinreb, David P. Woody, Nitika Yadlapalli, The Deep Synoptic Array Team   +23 more
doaj   +1 more source

New Insights in Extragalactic Magnetic Fields [PDF]

Proceedings of the International Astronomical Union, 2018
AbstractIn this contribution we introduce the motivation and goals of IAU Focus Meeting 8, “New Insights in Extragalactic Magnetic Fields”. We provide a background for the nine contributions included in these proceedings, as well as the online contributions.
Luigina Feretti, Federica Govoni, George Heald, Lawrence Rudnick, Melanie Johnston-Hollitt   +4 more
openaire   +1 more source