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

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

1998-07-22

arxiv.org/abs/astro-ph/9807225v1

Phys.Rev. D58 (1998) 103508

Astronomy and Astrophysics

Astrophysics

12 pages, 4 figures, Phys.Rev.D in press

Scientific paper

10.1103/PhysRevD.58.103508

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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