The cross-correlation between the microwave and X-ray backgrounds: foregrounds and systematics

S. Boughn; Robert Crittenden

doi:10.1111/j.1365-2966.2005.09090.x

The cross-correlation between the microwave and X-ray backgrounds: foregrounds and systematics

S. Boughn, Robert Crittenden

Institute of Cosmology & Gravitation

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Abstract

Recently, we presented evidence for a cross-correlation of the WMAP satellite map of the cosmic microwave background (CMB) and the HEAO1 satellite map of the hard X-ray background (XRB) with a dimensionless amplitude of 0.14 ± 0.05 normalized to the product of the rms fluctuations of the CMB and XRB. Such a correlation is expected in a universe dominated by a cosmological constant via the integrated Sachs–Wolfe (ISW) effect and the level of the correlation observed is consistent with that predicted by the currently favoured Lambda cold dark matter model of the Universe. As this offers independent confirmation of the cosmological model, it is important to verify the origin of the correlation. Here we explore in detail some possible foreground sources of the correlation. The present evidence all supports an ISW origin

Original language	English
Pages (from-to)	1013-1021
Number of pages	9
Journal	Monthly Notices of the Royal Astronomical Society
Volume	360
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2005.09090.x
Publication status	Published - 2005

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title = "The cross-correlation between the microwave and X-ray backgrounds: foregrounds and systematics",

abstract = "Recently, we presented evidence for a cross-correlation of the WMAP satellite map of the cosmic microwave background (CMB) and the HEAO1 satellite map of the hard X-ray background (XRB) with a dimensionless amplitude of 0.14 ± 0.05 normalized to the product of the rms fluctuations of the CMB and XRB. Such a correlation is expected in a universe dominated by a cosmological constant via the integrated Sachs–Wolfe (ISW) effect and the level of the correlation observed is consistent with that predicted by the currently favoured Lambda cold dark matter model of the Universe. As this offers independent confirmation of the cosmological model, it is important to verify the origin of the correlation. Here we explore in detail some possible foreground sources of the correlation. The present evidence all supports an ISW origin",

author = "S. Boughn and Robert Crittenden",

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AU - Boughn, S.

AU - Crittenden, Robert

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AB - Recently, we presented evidence for a cross-correlation of the WMAP satellite map of the cosmic microwave background (CMB) and the HEAO1 satellite map of the hard X-ray background (XRB) with a dimensionless amplitude of 0.14 ± 0.05 normalized to the product of the rms fluctuations of the CMB and XRB. Such a correlation is expected in a universe dominated by a cosmological constant via the integrated Sachs–Wolfe (ISW) effect and the level of the correlation observed is consistent with that predicted by the currently favoured Lambda cold dark matter model of the Universe. As this offers independent confirmation of the cosmological model, it is important to verify the origin of the correlation. Here we explore in detail some possible foreground sources of the correlation. The present evidence all supports an ISW origin

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DO - 10.1111/j.1365-2966.2005.09090.x

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SP - 1013

EP - 1021

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The cross-correlation between the microwave and X-ray backgrounds: foregrounds and systematics

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