Results 91 to 100 of about 19,051 (197)

Extragalactic and galactic sources: New evidence, new challenges, new opportunities

EPJ Web of Conferences, 2013
Recent data bring in sharper focus the issue of relative contributions of galactic and extragalactic sources of ultrahigh-energy cosmic rays. On the one hand, there is some new evidence, from gamma-ray observations of blazars, that cosmic rays are ...
Kusenko Alexander
doaj   +1 more source

Global anisotropy of arrival directions of ultra-high-energy cosmic rays: capabilities of space-based detectors

, 2008
Planned space-based ultra-high-energy cosmic-ray detectors (TUS, JEM-EUSO and S-EUSO) are best suited for searches of global anisotropies in the distribution of arrival directions of cosmic-ray particles because they will be able to observe the full sky ...
Abbasi R (HiRes Collaboration), Abrashkin V, Arisaka K, B A Khrenov, Cuoco A, Dolag K, Ebisuzaki T, Engel R (Pierre Auger Collaboration), Gelmini G Kalashev O Semikoz D V, Globus N Allard D Parizot E, Gorbunov D, Gorbunov D S, Harari D, Healy M D (Pierre Auger Collaboration), Huchra J, Jarrett T, Jarrett T, Jarrett T H, Jarrett T H, Kalashev O E Kuzmin V A Semikoz D V, Kuzmin V A, Kuzmin V A, O E Kalashev, P Klimov, Roth M (Pierre Auger Collaboration), S Sharakin, S V Troitsky, Santangelo A, Sigl G Miniati F Ensslin T A, Smialkowski A, Tompkins W, Torres D F, Zatsepin G T, Zatsepin G T   +33 more
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Extragalactic Magnetic Fields in the Extragalactic Universe and Scenarios Since Recombination for their Origin [PDF]

Highlights of Astronomy, 2002
AbstractI briefly review recent observations, some related physics and modelling, and future possibilities relating to our knowledge of the strength, structure and evolution of extragalactic magnetic fields.
openaire   +1 more source

Magnetic Fields in Large Diameter HII Regions Revealed by the Faraday Rotation of Compact Extragalactic Radio Sources

, 2011
We present a study of the line-of-sight magnetic fields in five large-diameter Galactic HII regions. Using the Faraday rotation of background polarized radio sources, as well as dust-corrected H-alpha surface brightness as a probe of electron density, we
B. M. Gaensler, Basu, Brisken, Brisken, Brogan, Brown, Chatterjee, Chatterjee, Condon, Cordes, Crutcher, Crutcher, Crutcher, Crutcher, Deller, Dodson, Finkbeiner, G. J. Madsen, Gaensler, Gaensler, Gray, Haffner, Han, Han, Heitsch, Heitsch, Kim, Koyama, Krumholz, L. Harvey-Smith, Law, Lyne, Madsen, Manchester, Manchester, Mao, Ostriker, Padoan, Piontek, Rand, Roshi, Sarma, Schlegel, Sota, Stil, Stil, Taylor, Thomson, Toscano, Van Eck, Whiting, Zweibel   +51 more
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Magnetic structure of our Galaxy: A review of observations

, 2009
The magnetic structure in the Galactic disk, the Galactic center and the Galactic halo can be delineated more clearly than ever before. In the Galactic disk, the magnetic structure has been revealed by starlight polarization within 2 or 3 kpc of the ...
Battaner, Han, Han, Han, Han, Han, Heiles, JinLin Han, Junkes, Mathewson, Men, Mitra, Prouza, Qiao, Roy, Sun, Sun, Sun   +17 more
core   +1 more source

Extragalactic Magnetic Field and the Highest Energy Cosmic Rays

The Astrophysical Journal, 1995
11 pages with 3 postscript figures; LaTeX with AASTeX macros; uuencoded 3 .eps figures; submitted to the ApJL; a postscript version of the paper also available at http://astro.uchicago.edu/home/web/sjlee/pub ...
Lee, Sangjin, Olinto, Angela, Sigl, Guenter   +2 more
openaire   +2 more sources

A Magnetized Local Supercluster and the Origin of the Highest Energy Cosmic Rays

, 1998
A sufficiently magnetized Local Supercluster can explain the spectrum and angular distribution of ultra-high energy cosmic rays. We show that the spectrum of extragalactic cosmic rays with energies below $\sim 10^{20}$ eV may be due to the diffusive ...
Angela V. Olinto, D. J. Bird, E. Waxman, F. Halzen, G. A. Medina Tanco, G. Burdman, G. T. Zatsepin, J. P. Vallee, J. P. Vallee, J. W. Cronin, J. Wdowczyk, K. Greisen, K. Jedamzik, K.-T. Kim, M. Lemoine, M. Nagano, N. Hayashida, P. Kronberg, P. P. Kronberg, Pasquale Blasi, R. Kulsrud, T. Stanev, V. S. Berezinskii, V. S. Berezinsky, V. S. Berezinsky   +24 more
core   +2 more sources

Rayos cósmicos ultra-energéticos y lentes magnéticas

Momento, 2000
I discuss the effects associated to the defiection of ultra- high energy cosmic rays by galactic magnetic fields. These are of particular interest for the study and localization of extragalactic sources, which is one of the primary objectives of the ...
Esteban Roulet
doaj  

Rotation Measure Jitter: Wavelength-dependent Scatter in Rotation Measure Related to Faraday Complexity

The Astrophysical Journal
The relation between Faraday rotation measure (RM) and differential Faraday rotation by unresolved structure of a turbulent plasma is investigated for extragalactic radio sources.
Jeroen M. Stil
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Galactic and extragalactic magnetic fields – a concise review

Astrophysics and Space Sciences Transactions, 2009
The strength of the total magnetic field in our Milky Way from radio synchrotron measurements is about 6 µG (0.6 nT), averaged over a radius of about 1 kpc around the Sun. Diffuse polarized radio emission and Faraday rotation of the polarized emission from pulsars and background sources show many small-scale magnetic features, but the overall ...
openaire   +2 more sources