2014/01/14 by О. К. Сильченко, Olga K. Sil'chenko, Sil'chenko, Olga K. +3
Earth and Planetary Sciences · Environmental Science · Physics and Astronomy · #Astrobiology #Astronomy #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Environmental science #FOS: Physical sciences #Geography #Geological Studies and Exploration #Geology #High-pressure geophysics and materials #Incidence (geometry) #Methane Hydrates and Related Phenomena #Optics #Physics #Polar #astro-ph.CO #astro-ph.GA
paper · pdf · doi:10.48550/arxiv.1401.3366
8 pages, 3 figures, to be published in the proceedings of the conference "Multi-Spin Galaxies" held in Napoli in October 2013
arxiv created 2014/01/14 · openalex publication_date 2014/01/14 · arxiv updated 2014/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We review our current knowledge about a particular case of decoupled gas kinematics -- inner ionized-gas polar disks. Though more difficult to be noticed, they seem to be more numerous than their large-scale counterparts; our recent estimates imply about 10 per cent of early-type disk galaxies to be hosts of inner polar disks. Since in the most cases the kinematics of the inner polar gaseous disks is decoupled from the kinematics of the outer large-scale gaseous disks and since they nested around very old stellar nuclei, we speculate that the inner polar disks may be relics of very early events of external gas accretion several Gyr ago. Such view is in agreement with our new paradigm of the disk galaxies evolution.