Export Citation
Export Citation
Kawata, D, Grand, RJJ 
ORCID: 0000-0001-9667-1340 and Cropper, M
(2012)
Stellar dynamics around transient co-rotating spiral arms.
In:
EPJ Web of Conferences
, 19.
(Assembling the Puzzle of the Milky Way, 17th - 22nd April 2011, Le Grand-Bornand, France).
Preview |
Text
Stellar dynamics around transient co rotating spiral arms.pdf - Published Version Available under License Creative Commons Attribution. Download (421kB) | Preview |
Abstract
Spiral density wave theory attempts to describe the spiral pattern in spiral galaxies in terms of a long-lived wave structure with a constant pattern speed in order to avoid the winding dilemma. The pattern is consequently a rigidly rotating, long-lived feature. We run an N-body/SPH simulation of a Milky Waysized barred disk, and find that the spiral arms are transient features whose pattern speeds decrease with radius, in such a way that the pattern speed is almost equal to the rotation curve of the galaxy. We trace particle motion around the spiral arms. We show that particles from behind and in front of the spiral arm are drawn towards and join the arm. Particles move along the arm in the radial direction and we find a clear trend that they migrate toward the outer (inner) radii on the trailing (leading) side of the arm. Our simulations demonstrate that tat all radii where there is a co-rotating spiral arm the particles continue to be accelerated (decelerated) by the spiral arm for long periods, which leads to strong migration.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | 5101 Astronomical Sciences; 51 Physical Sciences |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | EDP Sciences |
| Date of acceptance: | 1 July 2011 |
| Date of first compliant Open Access: | 14 January 2026 |
| Date Deposited: | 14 Jan 2026 13:10 |
| Last Modified: | 14 Jan 2026 13:10 |
| DOI or ID number: | 10.1051/epjconf/20121907006 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/27814 |
 |
View Item |