Transverse bar/bulge kinematics with Gaia and VVV. Issue Volume 14:Issue S353(2019) (June 2019)

• Record Type: Journal Article
• Authors: Sanders, Jason L.; Evans, N. Wyn; Smith, Leigh; Lucas, Philip
• Editors: Valluri, Monica; Sellwood, J. A.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue S353(2019)
• Page Start: 38
• Page End: 42
• Publication Date: 2019-06
• Subjects: Galaxy: structure, -- bulge, -- kinematics and dynamics, -- fundamental parameters; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319008664
• Languages: English
• ISSNs: 1743-9213

Abstract

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.