@article{185d758fa84743bfb55e5fe15555b6bc,
title = "The impact of the connectivity of the cosmic web on the physical properties of galaxies at its nodes",
abstract = "We investigate the impact of the number of filaments connected to the nodes of the cosmic web on the physical properties of their galaxies using the Sloan Digital Sky Survey. We compare these measurements to the cosmological hydrodynamical simulations HORIZON- (NO)AGN and SIMBA. We find that more massive galaxies are more connected, in qualitative agreement with theoretical predictions and measurements in dark-matter-only simulations. The star formation activity and morphology of observed galaxies both display some dependence on the connectivity of the cosmic web at a fixed stellar mass: Less star forming and less rotation supported galaxies also tend to have higher connectivity. These results qualitatively hold both for observed and for virtual galaxies, and can be understood given that the cosmic web is the main source of fuel for galaxy growth. The simulations show the same trends at a fixed halo mass, suggesting that the geometry of filamentary infall impacts galaxy properties beyond the depth of the local potential well. Based on simulations, it is also found that active galactic nucleus feedback is key to reversing the relationship between stellar mass and connectivity at a fixed halo mass. Technically, connectivity is a practical observational proxy for past and present accretion (minor mergers or diffuse infall).",
keywords = "Galaxies: Formation, Large-scale structure of Universe, Surveys",
author = "Katarina Kraljic and Christophe Pichon and Sandrine Codis and Clotilde Laigle and Romeel Dav{\'e} and Yohan Dubois and Hwang, {Ho Seong} and Dmitri Pogosyan and Stephane Arnouts and Julien Devriendt and Marcello Musso and S{\'e}bastien Peirani and Adrianne Slyz and Marie Treyer",
note = "Funding Information: We thank Elmo Tempel for suggestions that helped to improve the presentation. KK thanks Joanne Cohn for fruitful discussions and helpful comments. SC is partially supported by a research grant from Fondation MERAC. CL and JD acknowledge funding support from Adrian Beecroft and the STFC. We thank S. Rouberol for smoothly running the HORIZON cluster for us and T. Sousbie for his help with DISPERSE, which is available at the following URL: www2.iap.fr/users/sousbie/disperse. We thank Stephen Appleby for fruitful comments and discussions while this work was carried out. We also thank Daniel Angl{\'e}s-Alc{\'a}zar and Desika Narayanan for helpful discussions. SIMBA was run on the DiRAC@Durham facility managed by the Institute for Computational Cosmology on behalf of the STFC DiRAC HPC Facility. The equipment was funded by BEIS capital funding via STFC capital grants ST/P002293/1, ST/R002371/1, and ST/S002502/1, Durham University, and STFC operations grant ST/R000832/1. DiRAC is part of the National e-Infrastructure. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS web site is http://www.sdss.org/. The SDSS is managed Publisher Copyright: {\textcopyright} 2019 The Author(s).",
year = "2020",
doi = "10.1093/MNRAS/STZ3319",
language = "English (US)",
volume = "491",
pages = "4294--4309",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",
}