期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 428, 期 2, 页码 1827-1836出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts162
关键词
methods: statistical; galaxies: evolution; galaxies: general; galaxies: statistics; large-scale structure of Universe
资金
- Estonian Science Foundation [7765, 8005, 9428, MJD272]
- Estonian Ministry for Education and Science [SF0060067s08]
- Centre of Excellence of Dark Matter in (Astro)particle Physics and Cosmology [TK120]
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy Office of Science
Galaxies are not distributed randomly in the cosmic web but are instead arranged in filaments and sheets surrounding cosmic voids. Observationally, there is still no convincing evidence of a link between the properties of galaxies and their host structures. However, by the tidal torque theory (our understanding of the origin of galaxy angular momentum), such a link should exist. Using the presently largest spectroscopic galaxy redshift survey (Sloan Digital Sky Survey), we study the connection between the spin axes of galaxies and the orientation of their host filaments. We use a 3D field of orientations to describe cosmic filaments. To restore the inclination angles of galaxies, we use a 3D photometric model of galaxies that gives these angles more accurately than traditional 2D models. We found evidence that the spin axes of bright spiral galaxies have a weak tendency to be aligned parallel to filaments. For elliptical/S0 galaxies, we have a statistically significant result that their spin axes are aligned preferentially perpendicular to the host filaments; we show that this signal practically does not depend on the accuracy of the estimated inclination angles for elliptical/S0 galaxies.
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