Scattering of Cosmic X-Rays by Interstellar Dust Grains
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概要
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X-rays from celestial sources are scattered by interstellar dust grains. The apparent an-gular size of an X-ray source increases due to scattering, depending on the distance of the X-ray source, the wavelength of X-rays and the properties of dust grains. Hence the obser-vation of the scattering effect provides a new means of obtaining the distances of X-ray sources and various pieces of information on interstellar dust grains. Since the angular size is proportional to λ/a, where λ is the wavelength of X-rays and a the radius of grains, the ob-servation of the scattering effect is feasible at wavelengths greater than 10A^^ It is suggested that the wavelength slightly longer than the K-edge of oxygen is most advantageous, if silicate or silicate-ice mantle is the major component of interstellar dust grains.
- 一般社団法人日本物理学会の論文
- 1970-05-25
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