Results 1 to 10 of about 19,012 (167)

Influence of Extragalactic Magnetic Fields on Extragalactic Cascade Gamma-Ray Emission

Universe, 2022
We discuss the influence of extragalactic magnetic fields on the intensity of gamma-ray emission produced in electromagnetic cascades from ultra-high energy cosmic rays propagating in extragalactic space.
Anna Uryson
doaj   +3 more sources

Galactic and Extragalactic Magnetic Fields [PDF]

AIP Conference Proceedings, 2009
The strength of the total magnetic field in our Milky Way from radio Zeeman and synchrotron measurements is about 6 muG near the Sun and several mG in dense clouds, pulsar wind nebulae, and filaments near the Galactic Center.
Felix A. Aharonian, Frank Rieger, Rainer Beck, Werner Hofmann   +3 more
core   +4 more sources

New limits on extragalactic magnetic fields from rotation measures [PDF]

Physical Review Letters, 2016
We take advantage of the wealth of rotation measures data contained in the NRAO VLA Sky Survey catalogue to derive new, statistically robust, upper limits on the strength of extragalactic magnetic fields.
Pshirkov, Maxim S., Tinyakov, Peter G., Urban, Federico R.   +2 more
core   +3 more sources

A lower bound on the local extragalactic magnetic field [PDF]

Physical Review D, 2001
Assuming that the hard gamma-ray emission of Cen A is a result of synchrotron radiation of ultra-relativistic electrons, we derive a lower bound on the local extragalactic magnetic field, $B> 10^{-8}$ G.
A.M. Hillas, B. Cheng, B.L. Fanaroff, D. Grasso, D. Ryu, D. Zavrtanik, E. Waxman, E. Waxman, F.A. Aharonian, F.A. Aharonian, F.A. Aharonian, F.P. Israel, G.E. Romero, Haim Goldberg, J.A. Combi, J.D. Barrow, J.E. Grindlay, J.O. Burns, J.P. Rachen, J.P. Vallée, K. Jedamzik, K. Jedamzik, K. Mannheim, K. Mannheim, K. Mannheim, K. Mannheim, K.-T. Kim, L. Goorevich, L.A. Anchordoqui, L.J. Kewley, L.O’C. Drury, Luis A. Anchordoqui, M.M. Winn, M.M. Winn, N. Junkes, P. Bhattacharjee, P. Blasi, P. Kernan, P. Sreekumar, P.K. Kronberg, P.L. Biermann, R. Maartens, R.D. Blandford, R.J. Protheroe, R.J. Protheroe, R.J. Protheroe, R.W. Clay, S. Rawlings, T. Stanev, T.E. Clarke, V.L. Ginzburg   +50 more
core   +4 more sources

Extragalactic jets with helical magnetic fields: relativistic MHD simulations [PDF]

Astronomy & Astrophysics, 2008
Extragalactic jets are inferred to harbor dynamically important, organized magnetic fields which presumably aid in the collimation of the relativistic jet flows.
Appl, Appl, Asada, B. van der Holst, Baty, Begelman, Begelman, Bergmans, Blandford, Bodo, Bogovalov, Carvalho, Casse, Celotti, Contopoulos, del Zanna, Dulwich, F. Casse, Fendt, Georgeanopoulos, Georgeanopoulos, Ghisellini, Giroletti, Hardee, Hardee, Harris, Jester, Kellermann, Keppens, Koide, Komissarov, Komissarov, Leismann, Li, Majorama, Martí, McKinney, Meier, Meliani, Meliani, Mignone, Miller, Mizuno, O'Neill, Perucho, R. Keppens, Rawlings, Sambruna, Sambruna, Stawarz, Tavecchio, Tavecchio, Tavecchio, Tóth, van der Holst, van Putten, Vlahakis, Xu, Z. Meliani   +58 more
core   +8 more sources

Gravitational Lens Systems to probe Extragalactic Magnetic Fields [PDF]

, 2007
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
Chitre, S. M., Narasimha, D.
core   +3 more sources

Ultra-High Energy Heavy Nuclei Propagation in Extragalactic Magnetic Fields

Physical Review D, 2002
We extend existing work on the propagation of ultra-high energy cosmic rays in extragalactic magnetic fields to a possible component of heavy nuclei, taking into account photodisintegration, pion production, and creation of e+e- pairs.
Bertone, Gianfranco, Isola, Claudia, Lemoine, Martin, Sigl, Guenter   +3 more
core   +5 more sources

Constraints on UHECR Sources and Extragalactic Magnetic Fields from Directional Anisotropies [PDF]

The Astrophysical Journal
A dipole anisotropy in ultra–high-energy cosmic ray (UHECR) arrival directions, of extragalactic origin, is now firmly established at energies E > 8 EeV.
Teresa Bister, Glennys R. Farrar
doaj   +4 more sources

UHECR anisotropy and extragalactic magnetic fields with the Telescope Array [PDF]

EPJ Web of Conferences, 2023
We study the energy-dependent distribution of ultra-high energy cosmic ray arrival directions with respect to luminous matter in the local Universe. We use a specially designed test statistic (TS) that is robust to uncertainties of the galactic magnetic ...
Kuznetsov Mikhail, Tinyakov Peter
doaj   +1 more source

Magnetic fields and UHECR propagation [PDF]

EPJ Web of Conferences, 2023
I review the main observational tools used to detect and measure magnetic fields in the interstellar medium of our Galaxy (considering both the Galactic disk and the Galactic halo), in the interstellar medium of external galaxies, and in the ...
Ferrière Katia
doaj   +1 more source