An explanation of the galactic x-rays of fluctuating intensity, about 20 of which have been reported by balloon and rocket experiments since 1963. Hydromagnetic wave motions of the magnetic fields in the ionized gas of the galactic spiral arms create regions having fluctuating increases and decreases in gas pressure, magnetic fields, and size. In regions of sufficient compression, the gas becomes hot enough to emit x-rays. Two different calculation methods show such regions to be too small for observation by existing radio telescopes. Fluctuating x-ray sources should be abundant in the neighborhood of such disturbing phenomena as binary stars, globular clusters, nova and supernova explosions, high-velocity stars, and solar systems whose trajectories crisscross the galactic plane. 9 pp. Refs.
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