The 2-10 keV XRB dipole and its cosmological implications

The hard X-ray (>2 keV) emission of the local and distant Universe as observed with the HEAO1-A2 experiment is reconsidered in the context of large scale cosmic structure. Using all-sky X-ray samples of AGN and galaxy clusters we remove the dominant local X-ray flux from within a redshift of ~ 0....

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Bibliographic Details
Published in:arXiv.org 2000-08
Main Authors: Scharf, C A, Jahoda, K, Treyer, M, Lahav, O, Boldt, E, Piran, T
Format: Article
Language:English
Subjects:
Acceleration
Active galactic nuclei
Amplitudes
Anisotropy
Astronomical models
Cold dark matter
Dark matter
Dipoles
Elastic scattering
Emission
Flux
Fourier analysis
Galactic clusters
Galaxies
Harmonic analysis
Large scale structure of the universe
Red shift
Universe
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Summary:The hard X-ray (>2 keV) emission of the local and distant Universe as observed with the HEAO1-A2 experiment is reconsidered in the context of large scale cosmic structure. Using all-sky X-ray samples of AGN and galaxy clusters we remove the dominant local X-ray flux from within a redshift of ~ 0.02. We evaluate the dipolar and higher order harmonic structure in 4 X-ray colours. The estimated dipole anisotropy of the unresolved flux appears to be consistent with a combination of the Compton-Getting effect due to the Local Group motion (dipole amplitude Delta = 0.0042) and remaining large scale structure (0.0023
ISSN:2331-8422
DOI:10.48550/arxiv.9908187