Dancing in the dark: galactic properties trace spin swings along the cosmic web

• DOI: 10.1093/mnras/stu1227
• Publication Date: 2014-09-04T11:25:05Z
• Authors: Y. Dubois; C. Pichon; C. Welker; D. Le Borgne; J. Devriendt; C. Laigle; S. Codis; D. Pogosyan; S. Arnouts; K. Benabed; E. Bertin; J. Blaizot; F. Bouchet; J.-F. Cardoso; S. Colombi; V. de Lapparent; V. Desjacques; R. Gavazzi; S. Kassin; T. Kimm; H. McCracken; B. Milliard; S. Peirani; S. Prunet; S. Rouberol; J. Silk; A. Slyz; T. Sousbie; R. Teyssier; L. Tresse; M. Treyer; D. Vibert; M. Volonteri
• Keywords: Peculiar galaxy

A large-scale hydrodynamical cosmological simulation, Horizon-AGN, is used to investigate the alignment between spin of galaxies and cosmic filaments above redshift 1.2. The analysis more than 150 000 per time step in range 1.2 < z 1.8 with morphological diversity shows that low-mass blue preferentially aligned their neighbouring filaments, while high-mass red tend have a perpendicular spin. reorientation massive provided by galaxy mergers, which are significant mass build-up. We find stellar transition from misalignment happens around 3 × 1010舁M⊙. Galaxies form vorticity-rich neighbourhood migrate towards nodes web as they convert orbital angular momentum into signature this process can be traced properties galaxies, measured relative web. argue strong source feedback such active galactic nuclei mandatory quench situ star formation promote various morphologies. It allows mergers play key role reducing post-merger gas inflows and, therefore, keeping spins misaligned filaments.