Lindblad resonances of the Galactic bar. The solid (dotted) black line shows the angular frequency (angular frequency plus half of the epicyclic frequency) for the RGB stars, and the solid blue line shows the angular frequency for the OB stars. The horizontal dashed line represents the bar pattern speed, and the two vertical dashed lines at R = 5.4 and 9.7 kpc, with their uncertainty range in purple, are the location ranges of the corotation and outer Lindblad resonance, respectively.