2009/11/14 by Н. А. Силантьев, N. A. Silant'ev, M. Yu. Piotrovich +6
Physics and Astronomy · #Astrophysics and Star Formation Studies #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Solar and Space Plasma Dynamics #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.0911.2770
7 pages
arxiv created 2009/11/14 · openalex publication_date 2009/11/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Extreme-scale alignment of quasar optical polarization vectors at cosmological scales (z≤ 2) is also characterized by the rotation of mean position angle χ with Δχ≈ 30∘ per 1 Gpc. For observing interval of z the total rotation angle acquires the value ∼ 90∘. We suggest the possible explanation of the half of this rotation as a consequence of physical transformation of initially vertical magnetic field \bf B‖, directed along the normal \bf N to the surface of accretion disk, into the horizontal (perpendicular to \bf N) one. We found asymptotical analytical expressions for axially averaged polarization degree p and mean position angle χ for various types of magnetized accretion disks. We found also that during the evolution can be realized the case B\bot≈ B‖ where position angle χ rotates from 45∘ to zero. This rotation may occur during fairly great cosmological time (corresponding to Δz∼ 1-2). The part of rotation ∼ Δχ≈ 45∘ can be explained by a mechanism of alignment of polarization vectors, say distribution of the part of quasars as a spiral in the cosmic space with slow variation of rotation axis of corresponding accretion disks. Both mechanisms are mutually related one with another.