1. The NewHorizon Simulation -- To Bar Or Not To Bar
- Author
-
Dubois, Yohan, Beckmann, Ricarda, Bournaud, Frédéric, Choi, Hoseung, Devriendt, Julien, Jackson, Ryan, Kaviraj, Sugata, Kimm, Taysun, Kraljic, Katarina, Laigle, Clotilde, Martin, Garreth, Park, Min-Jung, Peirani, Sébastien, Pichon, Christophe, Volonteri, Marta, Yi, Sukyoung, Reddish, J., Petersen, M. S., Tep, K., Institut d'Astrophysique de Paris (IAP), and Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,Astrophysics of Galaxies (astro-ph.GA) ,FOS: Physical sciences ,Astronomy and Astrophysics ,High Energy Physics::Experiment ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Astrophysics::Galaxy Astrophysics - Abstract
We use the NewHorizon simulation to study the redshift evolution of bar properties and fractions within galaxies in the stellar masses range $M_{\star} = 10^{7.25} - 10^{11.4} \ \rm{M}_{\odot}$ over the redshift range $z = 0.25 - 1.3$. We select disc galaxies using stellar kinematics as a proxy for galaxy morphology. We employ two different automated bar detection methods, coupled with visual inspection, resulting in observable bar fractions of $f_{\rm bar} = 0.070_{{-0.012}}^{{+0.018}}$ at $z\sim$ 1.3, decreasing to $f_{\rm bar} = 0.011_{{-0.003}}^{{+0.014}}$ at $z\sim$ 0.25. Only one galaxy is visually confirmed as strongly barred in our sample. This bar is hosted by the most massive disk and only survives from $z=1.3$ down to $z=0.7$. Such a low bar fraction, in particular amongst Milky Way-like progenitors, highlights a missing bars problem, shared by literally all cosmological simulations with spatial resolution $, Comment: 25 pages, 13 figures, 5 tables, accepted by Monthly Notices of Royal Astronomical Society (MNRAS) on 16/02/22
- Published
- 2021