Production of metagalactic X-rays by relativistic dust grains |
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| Authors: | Satio Hayakawa |
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| Institution: | (1) Dept. of Physics, Nagoya University, Nagoya, Japan |
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| Abstract: | The relativistic dust grains which may be responsible for ultra-high energy cosmic rays, as suggested by the present author, interact with the cosmic black-body radiation. This results in the energy loss of the relativistic dust grains, so that their energy spectrum is cut-off at the Lorentz factor as large as 2×103 (0.1 /a), wherea is the grain radius. The black-body radiation is scattered and absorbed by the dust grains. The photons scattered and reemitted contribute to metagalactic X-rays. The X-ray intensity estimated is comparable to the observed one in the soft X-ray region. |
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