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Transverse bar/bulge kinematics with Gaia and VVV

  • Jason L. Sanders (a1), N. Wyn Evans (a1), Leigh Smith (a1) (a2) and Philip Lucas (a2)

Abstract

We present new results on the Galactic bar/bulge transverse velocity structure using Gaia and the VISTA Variables in Via Lactea (VVV) survey. Gaia is complemented in high extinction regions by the multi-epoch infrared VVV observations for which derived relative proper motions can be tied to Gaia’s absolute frame. We extract kinematic maps (both 2D and 3D) of the Galactic bar/bulge, from which we measure the pattern speed of the bar using a novel technique. We focus on the evidence of an X-shaped bulge from the kinematic maps.

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Keywords

Transverse bar/bulge kinematics with Gaia and VVV

  • Jason L. Sanders (a1), N. Wyn Evans (a1), Leigh Smith (a1) (a2) and Philip Lucas (a2)

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