Cosmic gamma-ray burst from intergalactic relativistic dust grains |
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| Authors: | Ajoy Kumar Dasgupta |
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| Institution: | (1) Dept. of Mathematics, University of Dundee, UK |
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| Abstract: | Charged dust grains of radiia 3×10–6 3×10–5 cm may acquire relativistic energy (>1018 eV) in the intergalactic medium. In order to attain relativistic energy, dust grains have to move in and out ( scattering ) of the magnetic field of the medium. A relativistic grain of radiusa 10–5 cm with Lorentz factor  103 approaching the Earth will break up either due to electrostatic charge or due to sputtering about 150100 km, and may scatter solar photons via a fluorescence process. Dust grains may also melt into droplets in the solar vicinity and may contribute towards observed gamma-ray bursts. |
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