X-ray scattering by intergalactic dust |
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| Authors: | A Evans G Norwell M F Bode |
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| Institution: | (1) Dept. of Physics, University of Keele, ST5 5BG Staffs;(2) Dept. of Astronomy, University of Manchester, M13 9PL |
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| Abstract: | The imaging capabilities of the Exosat and Einstein satellites at soft X-ray wavelengths have begun to show that suitable Galactic X-ray sources have extended ( 10 arcmin) haloes due to scattering of soft X-rays by interstellar dust. A simple argument suggests that similar haloes, due to scattering by intergalactic dust, should exist around distant (z 1) quasars and detailed analysis confirms this conclusion. A search for such haloes around suitable X-ray quasars could provide valuable, model-independent, constraints on the amount and origin of intergalactic dust. |
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