How do galaxies build up their spin in the cosmic web?
Abstract
Using the Horizon-AGN simulation we find a mass dependent spin orientation trend for galaxies: the spin of low-mass, rotation-dominated, blue, star-forming galaxies are preferentially aligned with their closest filament, whereas high-mass, velocity dispersion- supported, red quiescent galaxies tend to possess a spin perpendicular to these filaments. We explore the physical mechanisms driving galactic spin swings and quantify how much mergers and smooth accretion re-orient them relative to their host filaments.
- Publication:
-
The Zeldovich Universe: Genesis and Growth of the Cosmic Web
- Pub Date:
- October 2016
- DOI:
- 10.1017/S1743921316010310
- arXiv:
- arXiv:1410.4111
- Bibcode:
- 2016IAUS..308..433W
- Keywords:
-
- large-scale structure;
- galaxy formation;
- galaxy evolution;
- merger;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- proceedings of IAU 308 Conference, Tallinn, june 2014