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Small-Scale Fluctuations in Cosmic X-ray Background : A Power Spectrum Approach

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arxiv astro-ph/9807225 v1 pith:TBOFAYOF submitted 1998-07-22 astro-ph

classification astro-ph
keywords fluctuationsbackgroundmodelsx-raycosmiccosmologicalpowersources
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Equations to investigate fluctuations in cosmic X-ray background radiation due to point-like sources at high-redshift are formulated in a systematic way. The angular power spectrum of X-ray background fluctuations is investigated from large-scales to small-scales in various cosmological models such as open universe models and models with the cosmological constant, assuming a simple evolution model of the sources. The effect of epoch-dependent bias is demonstrated for small-angle fluctuations. The contribution from shot noise fluctuations is also discussed.

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