Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 428, Issue 4, Pages 3478-3486Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts285
Keywords
methods: numerical; Galaxy: kinematics and dynamics; Galaxy: structure
Categories
Funding
- Chinese Academy of Sciences
- NAOC
- National Natural Science Foundation of China [11073037, Y011061001, Y122071001]
- 973 Program of China [2009CB824800]
- STFC [ST/J001562/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001562/1] Funding Source: researchfish
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We demonstrate how the Syer and Tremaine made-to-measure method of stellar dynamical modelling can be adapted to model a rotating galactic bar. We validate our made-to-measure changes using observations constructed from the existing Shen et al. N-body model of the Milky Way bar, together with kinematic observations of the Milky Way bulge and bar taken by the Bulge Radial Velocity Assay. Our results for a combined determination of the bar angle and bar pattern speed (approximate to 30 degrees and approximate to 40 km s(-1) kpc(-1)) are consistent with those determined by the N-body model. Whilst the made-to-measure techniques we have developed are applied using a particular N-body model and observational data set, they are in fact general and could be applied to other Milky Way modelling scenarios utilizing different N-body models and data sets. Additionally, we use the exercise as a vehicle for illustrating how N-body and made-to-measure methods might be combined into a more effective method.
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