A slow lopsided bar in the interacting dwarf galaxy IC 3167

Abstract

We present surface photometry and stellar kinematics of IC 3167, a dwarf galaxy hosting a lopsided weak bar and infalling into the Virgo cluster. We measured the bar radius and strength from broad-band imaging and bar pattern speed by applying the Tremaine-Weinberg method to stellar-absorption integral-field spectroscopy. We derived the ratio of the corotation radius to bar radius (R = 1.7 + 0.5 - 0.3) from stellar kinematics and bar pattern speed. The probability that the bar is rotating slowly is more than twice as likely as that the bar is fast. This allows us to infer that the formation of this bar was triggered by the ongoing interaction rather than to internal processes.

Accepted for pubblication in MNRAS Letters

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• Properties of Barred Galaxies with the Environment: II. The case of the Cosmic Web around the Virgo cluster
• The Tremaine-Weinberg method at high redshifts
• Search for Slow Bars in Two Barred Galaxies with Nuclear Structures: NGC 6951 and NGC 7716
• The dynamical state of bars in cluster dwarf galaxies: The cases of NGC 4483 and NGC 4516