The redshift evolution of galactic bar pattern speed in TNG50

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Table 2

Mean bar properties at different redshifts.

	ɀ = 0.0	ɀ = 0.5	ɀ = 1.0
${\bar{R}}_{bar}$ ${\bar R_{{\rm{bar}}}}$ (kpc)	2.30±0.11	1.87 ± 0.14	1.71 ± 0.12
${\bar{Ω}}_{p} (\frac{km}{kpc s})$ ${\bar \Omega _p}\left( {{{{\rm{km}}} \over {{\rm{kpcs}}}}} \right)$	33.65 ± 1.07	48.61±1.85	70.98±2.34
$\bar{ℛ}$ $\overline {\cal R}$	${3.10}_{- 0.31}^{+ 0.33}$ $3.10_{ - 0.31}^{ + 0.33}$	${2.82}_{- 0.35}^{+ 0.36}$ $2.82_{ - 0.35}^{ + 0.36}$	${2.31}_{- 0.33}^{+ 0.34}$ $2.31_{ - 0.33}^{ + 0.34}$
f_slow	0.93	0.95	0.84
f_fast	0.05	0.04	0.13
f_ultrafast	0.02	0.01	0.03

Notes. The mean value of the bar radius, bar pattern speed, and the 𝓡 parameter in terms of redshift. f_slow is the fraction of the slow bars defined by 𝓡 > 1.4 , f_fast is the fraction of fast bars defined by 1 < 𝓡 < 1.4, and f_ultrafast is the fraction of ultrafast bars defined by 𝓡 < 1.

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