The NewHorizon simulation – to bar or not to bar

• DOI: 10.1093/mnras/stac494
• Publication Date: 2022-02-24T12:10:29Z
• Authors: J Reddish; K Kraljic; M S Petersen; K Tep; Y Dubois; C Pichon; S Peirani; F Bournaud; H Choi; J Devriendt; R Jackson; G Martin; M J Park; M Volonteri; S K Yi
• Keywords: Bar (unit); Stellar mass

ABSTRACT We use the NewHorizon simulation to study redshift evolution of bar properties and fractions within galaxies in stellar masses range M⋆ = 107.25–1011.4$\, \rm {M}_\odot$ over z 0.25–1.3. select disc using kinematics as a proxy for galaxy morphology. employ two different automated detection methods, coupled with visual inspection, resulting observable fbar 0.070$_{{-0.012}}^{{+0.018}}$ at ∼ 1.3, decreasing 0.011$_{{-0.003}}^{{+0.014}}$ 0.25. Only one is visually confirmed strongly barred our sample. This hosted by most massive only survives from 1.3 down 0.7. Such low fraction, particular amongst Milky Way-like progenitors, highlights missing bars problem, shared literally all cosmological simulations spatial resolution <100 pc date. The analysis linear growth rates, rotation curves, derived summary statistics stellar, gas dark matter components suggest that below 109.5−1010$\, appear be too dominated relative content form bar, while more typically have formed large bulges prevent persistence redshift. investigation confirms fraction puts stringent constraints on assembly history baryons galaxies.