Hunt, JAS;
Bub, MW;
Bovy, J;
Mackereth, JT;
Trick, WH;
Kawata, D;
(2019)
Signatures of resonance and phase mixing in the Galactic disc.
Monthly Notices of the Royal Astronomical Society
, 490
(1)
pp. 1026-1043.
10.1093/mnras/stz2667.
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Abstract
Gaia DR2 has provided an unprecedented wealth of information about the kinematics of stars in the Solar neighbourhood, and has highlighted the degree of features in the Galactic disc. We confront the data with a range of bar and spiral models in both action-angle space, and the RG–vϕ plane. We find that the phase mixing induced by transient spiral structure creates ridges and arches in the local kinematics which are consistent with the Gaia data. We are able to produce a qualitatively good match to the data when combined with a bar with a variety of pattern speeds, and show that it is non-trivial to decouple the effects of the bar and the spiral structure.
| Type: | Article |
|---|---|
| Title: | Signatures of resonance and phase mixing in the Galactic disc |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stz2667 |
| Publisher version: | https://doi.org/10.1093/mnras/stz2667 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Galaxy: bulge, Galaxy: disc, Galaxy: fundamental parameters, Galaxy: kinematics and dynamics, solar neighbourhood, Galaxy: structure |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10084586 |
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