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Managing resonant-trapped orbits in our Galaxy

Abstract:

Galaxy modelling is greatly simplified by assuming the existence of a global system of angleaction coordinates. Unfortunately, global angle-action coordinates do not exist because some orbits become trapped by resonances, especially where the radial and vertical frequencies coincide.We show that in a realistic Galactic potential such trapping occurs only on thick-disc and halo orbits (speed relative to the guiding centre ≳80 km s−1). We explain how the TORUS MAPPER code (TM) behaves in region...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1093/mnras/stw1795

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Theoretical Physics
Oxford college:
Merton College
Publisher:
Oxford University Press Publisher's website
Journal:
Monthly Notices of the Royal Astronomical Society Journal website
Volume:
462
Issue:
3
Pages:
2792-2803
Publication date:
2016-08-05
Acceptance date:
2016-07-19
DOI:
EISSN:
1365-2966
ISSN:
0035-8711
Pubs id:
pubs:742094
URN:
uri:d63163c4-6b60-49f7-93c7-8a732c37da2a
UUID:
uuid:d63163c4-6b60-49f7-93c7-8a732c37da2a
Local pid:
pubs:742094

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