A mechanism to explain Galaxy alignment over a range of scales
arXiv:2108.05011 · doi:10.1093/mnras/stac887
Abstract
The observed large-scale alignment of polarization angles and galaxy axis have been challenging the fundamental assumption of homogeneity and isotropy in standard cosmology since more than two decades. The intergalactic magnetic field, and its correlations in real space, potentially seems as a viable candidate for explaining this phenomenon. It has been shown earlier that the large-scale intergalactic magnetic field correlations can explain the alignment signal of quasars over Gpc scale, interestingly they can also explain the radio polarization alignment observed in JVAS/CLASS data over 100 Mpc. Motivated with recent observations of galaxy axis alignment over several tens of Mpc, and Mpc scale, i.e., the cluster scale, we further explore the correlations of background magnetic field to explain these relatively small scale alignment observations. In particular, we explore two recently claimed signals of alignment in the radio sources in the FIRST catalog and in the ACO clusters. We find that the FIRST alignment signal is well explained in terms of the intergalactic magnetic field with a spectral index of . Furthermore, the model also partially explains the very small scale alignment (alignment within clusters). Though the elementary model proposed in this work seems to have its limitations at very small scales, the large-scale magnetic field correlations potentially seem to explain the polarization and galaxy axis alignment from Gpc to Mpc scales.
arXiv comment8 pages, 7 figures, published in MNRAS
References in corpus (46)
- The Sloan Digital Sky Survey: Technical Summary
- The Fifth Data Release of the Sloan Digital Sky Survey
- Intrinsic and Extrinsic Galaxy Alignment
- The Last of FIRST: The Final Catalog and Source Identifications
- The VLBA Imaging and Polarimetry Survey at 5 GHz
- Galaxy spin alignment in filaments and sheets: observational evidence
- Mapping extreme-scale alignments of quasar polarization vectors
- A Unified Catalog of Radio Objects Detected by NVSS, FIRST, WENSS, GB6, and SDSS
- Galaxy alignments: Theory, modelling and simulations
- Revisiting the NVSS number count dipole
- Alignments of galaxies within cosmic filaments from SDSS DR7
- Confirmation of the existence of coherent orientations of quasar polarization vectors on cosmological scales
- The LBDS Hercules sample of mJy radio sources at 1.4 GHz - II. Redshift distribution, radio luminosity function, and the high-redshift cut-off
- Intrinsic Differences in the Inner Jets of High- and Low-Optically Polarized Radio Quasars
- The luminosity-dependent high-redshift turnover in the steep spectrum radio luminosity function: clear evidence for downsizing in the radio-AGN population
- Alignments of Radio Galaxies in Deep Radio Imaging of ELAIS N1
- Large Scale Alignment of Optical Polarizations from Distant QSOs using Coordinate Invariant Statistics
- Electromagnetic Polarization Effects due to Axion Photon Mixing
- VLBI Polarimetry of 177 Sources from the Caltech-Jodrell Bank Flat-spectrum Survey
- Test particle motion in the space-time of a Kerr black hole pierced by a cosmic string
- Alignments of the Dominant Galaxies in Poor Clusters
- CENSORS: A Combined EIS-NVSS Survey Of Radio Sources. I. Sample definition, radio data and optical identifications
- Detecting Galaxy-Filament Alignments in the Sloan Digital Sky Survey III
- The polarization in the JVAS/CLASS flat-spectrum radio sources: II. A search for aligned radio polarizations
- The clustering of radio galaxies: biasing and evolution versus stellar mass
- Can primordial magnetic fields seeded by electroweak strings cause an alignment of quasar axes on cosmological scales?
- Can axion-like particles explain the alignments of the polarisations of light from quasars?
- Alignments in quasar polarizations: pseudoscalar-photon mixing in the presence of correlated magnetic fields
- Optical circular polarization in quasars
- The LBDS Hercules sample of millijansky radio sources at 1.4 GHz: I. Multi-colour photometry
- Radio Galaxy Zoo: Cosmological Alignment of Radio Sources
- Polarization alignments of radio quasars in JVAS/CLASS surveys
- Polarization Alignment in JVAS/CLASS flat spectrum radio surveys
- Large-Scale Magnetic Fields, Dark Energy and QCD
- Evolution of polarization orientations in a flat universe with vector perturbations: CMB and quasistellar objects
- Evidence of isotropy at large-scale from polarizations of radio sources
- Alignment of Radio Galaxy Axes using FIRST Catalogue
- Covariant Symmetry Classifications for Observables of Cosmological Birefringence
- A new analysis of quasar polarisation alignments
- Extracting Spectral Index of Intergalactic Magnetic Field from Radio Polarizations
- Galaxy power spectrum and biasing results from the LOFAR Two-metre Sky Survey (first data release)
- Local alignments of parsec-scale AGN radiojets
- Electrodynamic effect of anisotropic expansions in the Universe
- Global alignments of parsec-scale AGN radio jets and their polarization planes
- Rotation of the polarization vector from distant radio galaxies in the perturbed FRW metric
- On the Alignment of Galaxies in Clusters