منابع مشابه
Ultra–High Energy Cosmic Rays, Spiral Galaxies and Magnetars
We measure the correlation between the arrival directions of the highest energy cosmic rays detected by the Pierre Auger Observatory with the position of the galaxies in the H I Parkes All Sky Survey (HIPASS) catalogue, weighted for their H I flux and Auger exposure. The use of this absorption–free catalogue, complete also along the galactic plane, allows us to use all the Auger events. The cor...
متن کاملCosmic electron gradients in the inner heliosphere
[1] We report the first determination of the radial gradient of cosmic ray electrons in the inner heliosphere at rigidities of 1.2 and 2.5 GV from 1 to 5 AU. Since this determination was made during the A solar polarity state, it also constitutes the only determination for particles in a polarity state opposite to their charge sign.We find that the radial gradient for electrons is indistinguish...
متن کاملMagnetars in the Metagalaxy: An Origin for Ultra High Energy Cosmic Rays in the Nearby Universe
I show that the relativistic winds of newly born magnetars (neutron stars with petagauss surface magnetic fields) with initial spin rates close to the centrifugal breakup limit, occurring in all normal galaxies with massive star formation, can provide a source of ultrarelativistic light ions with an E injection spectrum, steepening to E at higher energies, with an upper cutoff at 10 − 10 eV. In...
متن کاملAcceleration of Cosmic Rays at Cosmic Shocks
Nonthermal particles can be produced due to incomplete thermalization at collisionless shocks and further accelerated to very high energies via diffusive shock acceleration. In a previous study we explored the cosmic ray (CR) acceleration at cosmic shocks through numerical simulations of CR modified, quasi-parallel shocks in 1D plane-parallel geometry with the physical parameters relevant for t...
متن کاملTiming Properties of Magnetars
We study the pulse morphologies and pulse amplitudes of thermally emitting neutron stars with ultrastrong magnetic fields. The beaming of the radiation emerging from a magnetar was recently shown to be predominantly non-radial, with a small pencil and a broad fan component. We show that the combination of this radiation pattern with the effects of strong lensing in the gravitational field of th...
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ژورنال
عنوان ژورنال: Nature
سال: 2010
ISSN: 0028-0836,1476-4687
DOI: 10.1038/468015a