搜索结果: 1-14 共查到“天文学 Ultra High Energy”相关记录14条 . 查询时间(0.164 秒)
Blazars as Ultra-High-Energy Cosmic-Ray Sources: Implications for TeV Gamma-Ray Observations
Ultra-High-Energy Cosmic-Ray Sources Implications TeV Gamma-Ray Observations
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2011/10/20
Spectral fitting of correlated multiwavelength data of BL Lac objects and Fanaroff-Riley I radio galaxies gives the mean comoving magnetic field strength B', the bulk outflow Doppler factor Gamma, and...
Ultra High Energy Comic Rays in the Cosmic Microwave Background
Ultra High Energy Comic Rays Cosmic Microwave Background
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2011/10/13
We consider the propagation of ultra high energy cosmic rays (UHECR), for energies greater than E > 10^{14} eV but less than E < 10^{26} eV, in the cosmic medium of the Cosmic Microwave Background (CM...
Constraints on the origin of ultra-high-energy cosmic rays from cosmogenic neutrinos and photons
Astroparticle physics Acceleration of particles Abundances Neutrinos Gamma-rays Relativistic processes
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2011/10/11
We study the production of cosmogenic neutrinos and photons during the extragalactic propagation of ultra-high-energy cosmic rays (UHECRs). For a wide range of models in cosmological evolution of sour...
Search for Nuclei Sources in the Ultra-High Energy Cosmic Ray Data
Ultra-High Energy Cosmic Rays Galactic Magnetic Field
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2011/10/8
We present a new method to search for heavy nuclei sources, on top of background, in the Ultra-High Energy Cosmic Ray data. We apply it to the 69 events with energies E>55 EeV published by the Pierre ...
A decay of the ultra-high-energy neutrino $\nu_e \to e^- W^+$ in a magnetic field and its influence on the shape of the neutrino spectrum
the ultra-high-energy neutrino the neutrino spectrum
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2011/1/13
The width of the neutrino decay into the electron and $W$ boson in a strong external magnetic field is obtained from the imaginary part of the neutrino self-energy. This result corrects the formulae ...
A new limit on the Ultra-High-Energy Cosmic-Ray flux with the Westerbork Synthesis Radio Telescope
the Ultra-High-Energy Cosmic-Ray flux the Westerbork Synthesis Radio Telescope
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2011/1/13
A particle cascade (shower) in a dielectric, for example as initiated by an ultra-high energy cosmic ray, will have an excess of electrons which will emit coherent \v{C}erenkov radiation, known as the...
The MIDAS experiment: A prototype for the microwave emission of Ultra-High Energy Cosmic Rays
The MIDAS experimen the microwave emission Ultra-High Energy Cosmic Rays
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2011/1/11
Recent measurements suggest that extensive air showers initiated by ultra-high energy cosmic rays (UHECR) emit signals in the microwave band of the electromagnetic spectrum caused by the collisions of...
Ultra high energy cosmic rays: A review
gh energy cosmic rays review
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2010/11/12
We present the main results on the energy spectrum and compo-sition of the highest energy cosmic rays of energy exceeding 1018 eV obtained by the High Resolution Fly’s Eye and the Southern Auger Ob-se...
CRT: A numerical tool for propagating ultra-high energy cosmic rays through Galactic magnetic field models
Instrumentation and Methods for Astrophysics (astro-ph.IM)
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2011/1/6
Deflection of ultra high energy cosmic rays (UHECRs) by the Galactic magnetic field (GMF) may be sufficiently strong to hinder identification of the UHECR source distribution. A common method for dete...
Analytic Solutions of Ultra-High Energy Cosmic Ray Nuclei Revisited
High Energy Astrophysical Phenomena (astro-ph.HE) High Energy Physics - Phenomenology (hep-ph)
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2011/1/5
The chemical composition of ultra-high energy cosmic rays is a key question in particle astrophysics. The measured composition, inferred from the elongation rates of cosmic ray showers, looks in gener...
The Production of Ultra High Energy Cosmic Rays during the Early Epochs of Radio-loud AGN
High Energy Astrophysical Phenomena (astro-ph.HE)
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2011/1/4
Powerful radio-loud active galactic nuclei (AGN) with large Mpc-scale jets have been theoretically motivated as emitters of high-energy cosmic rays. Recent radio observations have established a populo...
(Ultra-)High Energy Muon Neutrino Propagation through the Earth and Induced Muon Energy Distribution near the One Cubic Kilometer Detector
High Energy Astrophysical Phenomena (astro-ph.HE) High Energy Physics - Experiment (hep-ex)
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2010/12/28
We calculate high and (ultra-)high energy upward-going muon neutrino propagation through the Earth and the induced muon energy distribution near the one cubic kilometer detector using the Monte Carlo ...
Simulation of the Event Reconstruction of Ultra High Energy Cosmic Neutrinos with Askaryan Radio Array
Ultra High Energy Cosmic Neutrinos Askaryan Radio Array
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2010/3/8
Askaryan Radio Array (ARA), a large-scale radio Cherenkov observatory which scientists propose to develop in Antarctica, aims at discovering the origin and evolution of the cosmic accelerators that pr...
Ultra-high-energy cosmic ray acceleration by magnetic reconnection in newborn pulsars
newborn pulsars cosmic ray magnetic reconnection
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2009/6/4
Ultra-high-energy cosmic ray acceleration by magnetic reconnection in newborn pulsars。