首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Bulk motions of spiral galaxies in the z = 0.03 volume
Authors:Yu N Kudrya  V E Karachentseva  I D Karachentsev  S N Mitronova  W K Huchtmeier
Institution:(1) Astronomical Observatory, Kiev National University, Observatorna ul., Kiev, 304053, Ukraine;(2) Special Astrophysical Observatory, Russian Academy of Sciences, Nizhniĭ Arkhyz, 357147, Karachaĭ-Cherkessian Republic, Russia;(3) Max Planck Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Abstract:We analyze the peculiar velocity field for 2400 flat spiral galaxies selected from an infrared sky survey (2MFGC). The distances to the galaxies have been determined from the Tully-Fisher relation in the photometric J band with a dispersion of 0m.45. The bulk motion of this sample relative to the cosmic microwave background (3K) frame has an amplitude of 199 ± 37 km s?1 in the direction l = 290° ± 11°, b = +1° ± 9°. The amplitude of the dipole motion tends to decrease with distance in accordance with the expected convergence of bulk flows in the 3K frame. We believe that external massive attractors similar to the Shapley cluster concentration are responsible for ~60% of the local flow velocity in the z = 0.03 volume.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号