Isotropy of the 3 K Background

Henry, P.

doi:10.1038/231516a0

Cited by 101 publications

(54 citation statements)

References 13 publications

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“…Deviations from this isotropy were first found in the form of a temperature dipole at the level of ∼ 3mK [2,3]. This dipole has been interpreted as the effect of Doppler shift and aberration due to the proper motion of the Solar System [4] with respect to a cosmological rest frame.…”

Section: Introductionmentioning

confidence: 99%

CMB anomalies after Planck

Schwarz

Copi

Huterer

et al. 2016

Class. Quantum Grav.

341

357

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Abstract. Several unexpected features have been observed in the microwave sky at large angular scales, both by WMAP an by Planck. Among those features is a lack of both variance and correlation on the largest angular scales, alignment of the lowest multipole moments with one another and with the motion and geometry of the Solar System, a hemispherical power asymmetry or dipolar power modulation, a preference for odd parity modes and an unexpectedly large cold spot in the Southern hemisphere. The individual p-values of the significance of these features are in the per mille to per cent level, when compared to the expectations of the best-fit inflationary ΛCDM model. Some pairs of those features are demonstrably uncorrelated, increasing their combined statistical significance and indicating a significant detection of CMB features at angular scales larger than a few degrees on top of the standard model. Despite numerous detailed investigations, we still lack a clear understanding of these large-scale features, which seem to imply a violation of statistical isotropy and scale invariance of inflationary perturbations. In this contribution we present a critical analysis of our current understanding and discuss several ideas of how to make further progress.

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Section: Introductionmentioning

confidence: 99%

CMB anomalies after Planck

Schwarz

Copi

Huterer

et al. 2016

Class. Quantum Grav.

341

357

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“…For many terrestrial applications, the results of Maxwell's equations agree in good approximation with the Galilei covariant EM theory, since w/c o~1 0 -3 on the earth [14]. .…”

Section: Unauthenticatedmentioning

confidence: 64%

Electromagnetic Field of Accelerated Charges in Inertial Frames with Substratum Flow

Wilhelm¹

1990

Zeitschrift Für Naturforschung A

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By means of the generalized Galilei covariant EM field equations, the EM potentials and EM fields of a charged particle moving with an arbitrary nonuniform velocity v(t) in an inertial frame with substratum flow w are calculated. It is shown that the dynamic EM fields are excitations of the EM ether caused by the motion v(t) -w of the charge relative to the wave carrier with velocity w. Qualitatively and quantitatively significant EM inductions and convective deformations of EM fields by the ether flow w exist in inertial frames with ether velocities w~c 0 comparable to the velocity of light. For many terrestrial applications, the ordinary Maxwell equations agree in good approximation with the Galilei covariant EM field equations since w/c 0~ 10" 3 on the earth.

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“…The Cosmic Microwave Background (CMB) dipole anisotropy, interpreted as the consequence of the peculiar motion of the Local group (LG) relative to the CMB frame of reference is the best evidence and example of that motion. First hints for the dipole anisotropy were given by Conklin (1969) and Henry (1971) and a more definitive determination by Smoot et al (1977). In the standard model the density and the velocity fields are connected and one can opt for a full description of the LSS of the universe by means of either the density or the velocity (or both) field (Peebles 1980).…”

Section: Introductionmentioning

confidence: 99%

Goodness-of-fit analysis of the Cosmicflows-2 data base of velocities

Hoffman

Nusser

Courtois

et al. 2016

Mon. Not. R. Astron. Soc.

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The goodness-of-fit (GoF) of the Cosmicflows-2 (CF2) database of peculiar velocities with the ΛCDM standard model of cosmology is presented. Standard application of the χ 2 statistics of the full database, of its 4,838 data points, is hampered by the small scale non-linear dynamics which is not accounted for by the (linear regime) velocity power spectrum. The bulk velocity constitutes a highly compressed representation of the data which filters out the small scales non-linear modes. Hence the statistics of the bulk flow provides an efficient tool for assessing the GoF of the data given a model. The particular approach introduced here is to use the (spherical top-hat window) bulk velocity extracted from the Wiener filter reconstruction of the 3D velocity field as a linear low pass filtered highly compressed representation of the CF2 data. An ensemble 2250 random linear realizations of the WMAP/ΛCDM model has been used to calculate the bulk velocity auto-covariance matrix. We find that the CF2 data is consistent with the WMAP/ΛCDM model to better than the 2σ confidence limits. This provides a further validation that the CF2 database is consistent with the standard model of cosmology.

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Isotropy of the 3 K Background

Cited by 101 publications

References 13 publications

CMB anomalies after Planck

CMB anomalies after Planck

Electromagnetic Field of Accelerated Charges in Inertial Frames with Substratum Flow

Goodness-of-fit analysis of the Cosmicflows-2 data base of velocities

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