Bar-induced non-circular gas motions create a characteristic rise-drop-rise dip in tilted-ring rotation curves when the bar and disk are nearly aligned, and this dip appears in many PHANGS-ALMA barred galaxies.
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The Impact of Bar-induced Non-Circular Motions on the Measurement of Galactic Rotation Curves
Bar-induced non-circular gas motions create a characteristic rise-drop-rise dip in tilted-ring rotation curves when the bar and disk are nearly aligned, and this dip appears in many PHANGS-ALMA barred galaxies.