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The cosmic dipole anomaly -- the observation of a significant mismatch between the dipole observed in the matter distribution and that expected given the kinematic interpretation of the cosmic microwave background dipole -- poses a serious…

宇宙学与河外天体物理 · 物理学 2026-02-25 Sebastian von Hausegger , Nathan Secrest , Harry Desmond , Mohamed Rameez , Roya Mohayaee , Subir Sarkar

In this article I study the distribution of spiral galaxies in the Sloan Digital Sky Survey (SDSS) to investigate whether the universe has an overall handedness. A preference for spiral galaxies in one sector of the sky to be left-handed or…

天体物理学 · 物理学 2007-08-29 Michael J. Longo

Given an arbitrary function, we may construct symmetric and antisymmetric functions under a certain operation. Since statistical isotropy and homogeneity of our Universe has been a fundamental assumption of modern cosmology, we do not…

宇宙学与河外天体物理 · 物理学 2012-08-23 Jaiseung Kim , Pavel Naselsky , Martin Hansen

In his 2021 lecture to the Canadian Association of Physicists Congress, P.J.E. Peebles pointed out that the brightest extra-galactic radio sources tend to be aligned with the plane of the de Vaucouleur Local Supercluster up to redshifts of…

宇宙学与河外天体物理 · 物理学 2024-01-02 Matthieu Schaller

We test the asymmetry of the Cosmic Microwave Background anisotropy jointly in temperature and polarization. We study the hemispherical asymmetry, previously found only in the temperature field, with respect to the axis identified by Hansen…

宇宙学与河外天体物理 · 物理学 2010-10-13 F. Paci , A. Gruppuso , F. Finelli , P. Cabella , A. De Rosa , N. Mandolesi , P. Natoli

We report recent results from the Pierre Auger Observatory about the study of the anisotropy in the arrival directions of ultra-high energy cosmic rays. We present the results of the search for a dipolar anisotropy at the EeV energy scale.…

高能天体物理现象 · 物理学 2019-08-13 J. R. T. de Mello Neto

We argue that the diffusion of cosmic rays in the Galactic magnetic field has to be strongly anisotropic. As a result, the number of CR sources contributing to the local CR flux is reduced by a factor $\sim 200$. The CR density is therefore…

高能天体物理现象 · 物理学 2019-05-22 M. Kachelriess

We predict energy spectra and angular distributions of nucleons above 10**(19) eV that originate from sources distributed in the Local Supercluster, which is also supposed to contain a large scale magnetic field of strength between 0.05 and…

天体物理学 · 物理学 2007-05-23 Martin Lemoine , Guenter Sigl , Peter Biermann

In the standard picture of cosmic ray transport the propagation of charged cosmic rays through turbulent magnetic fields is described as a random walk with cosmic rays scattering on magnetic field turbulence. This is in good agreement with…

高能天体物理现象 · 物理学 2021-07-08 Marco Kuhlen , Philipp Mertsch , Vo Hong Minh Phan

The (pion) decays controlled by axial anomaly imply the specific entanglement between photons having also the counterparts for classical electromagnetic waves. This is also a specific case of Eisnstein-Podolsky-Rosen-Bohm-Aharonov effect.…

高能物理 - 唯象学 · 物理学 2026-01-26 O. V. Teryaev

We calculate the large-scale cosmic-ray (CR) anisotropies predicted for a range of Goldreich-Sridhar (GS) and isotropic models of interstellar turbulence, and compare them with IceTop data. In general, the predicted CR anisotropy is not a…

高能天体物理现象 · 物理学 2017-02-07 Gwenael Giacinti , John G. Kirk

We explore the possibility that the recently detected dipole anisotropy in the arrival directions of~$>8$~EeV ultra-high energy cosmic-rays (UHECRs) arises due to the large-scale structure (LSS). We assume that the cosmic ray sources follow…

高能天体物理现象 · 物理学 2017-12-06 Noemie Globus , Tsvi Piran

The Cosmological Principle assumes a statistically isotropic Universe, but the Cosmic Microwave Background (CMB) exhibits some anomalous statistical features, such as the hemispherical power asymmetry, that challenge this core assumption.…

宇宙学与河外天体物理 · 物理学 2026-03-25 Javier Carrón Duque , Mikel Martin Barandiaran , Joseba Martínez-Arrizabalaga

The Cosmological Principle states that the universe is statistically isotropic and homogeneous on large length scales, typically $\gtrsim 70$Mpc. A detection of significant deviation would help us falsify the simplest models of inflation.…

宇宙学与河外天体物理 · 物理学 2025-08-26 Bhuwan Joshi , Rahul Kothari

We compared the Planck 2018 data on the large-scale anisotropies in the cosmic microwave background to the results obtained in the slightly anisotropic ellipsoidal universe. We focused on the quadrupole temperature correlations to better…

宇宙学与河外天体物理 · 物理学 2019-11-12 Paolo Cea

The distribution of spin direction of ~6.4*10^4 spiral galaxies with spectra was examined. The analysis shows a statistically significant cosmological-scale asymmetry between galaxies with opposite spin direction. The data also reveals that…

星系天体物理 · 物理学 2019-12-18 Lior Shamir

Cosmological observations on the largest scales exhibit a solid record of unexpected anomalies and alignments, apparently pointing towards a large scale violation of statistical isotropy. These include a variety of CMB measurements, as well…

宇宙学与河外天体物理 · 物理学 2011-07-15 Federico R. Urban , Ariel R. Zhitnitsky

There is tentative evidence for a mismatch between the rest frames of matter and the cosmic microwave background, the "quasar dipole anomaly". We consider such a dipole in tilted anisotropic models, for a range of scenarios and sources:…

宇宙学与河外天体物理 · 物理学 2025-12-04 Alicia Martín , Constantinos Skordis , Deaglan J. Bartlett , Harry Desmond , Pedro G. Ferreira , Tariq Yasin

We examine all-sky cosmic microwave background (CMB) temperature maps on large angular scales to compare their consistency with two scenarios: the standard inflationary quantum picture, and a distribution constrained to have a universal…

宇宙学与河外天体物理 · 物理学 2022-04-13 Nathaniel Selub , Frederick Wehlen , Craig Hogan , Stephan S. Meyer

A growing number of Milky Way globular clusters have been identified to possess a noticeable degree of solid-body rotation. For several clusters, the combination of stellar proper motions and radial velocities allows for 3-dimensional spin…

星系天体物理 · 物理学 2023-06-21 Ciaran A. J. O'Hare , Alberto Krone-Martins , Celine Boehm , Roland M. Crocker
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