Spiral arm crossings inferred from ridges in Gaia stellar velocity distributions
(2018) In Monthly Notices of the Royal Astronomical Society 480(3). p.3132-3139- Abstract
The solar neighbourhood contains disc stars that have recently crossed spiral arms in the Galaxy. We propose that boundaries in local velocity distributions separate stars that have recently crossed and been more strongly perturbed by a particular arm from those that haven't. Ridges in the stellar velocity distributions constructed from the second Gaia data release trace orbits that could have touched nearby spiral arms at apocentre or pericentre. The multiple ridges and arcs seen in local velocity distributions are consistent with the presence of multiple spiral features and different pattern speeds and imply that the outer Galaxy is flocculent rather than grand design.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/d4aecebf-fef6-45fc-9d26-f71e74f63d4a
- author
- Quillen, Alice C. ; Carrillo, Ismael ; Anders, Friedrich ; McMillan, Paul LU ; Hilmi, Tariq ; Monari, Giacomo ; Minchev, Ivan ; Chiappini, Cristina ; Khalatyan, Arman and Steinmetz, Matthias
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Galaxy: kinematics and dynamics
- in
- Monthly Notices of the Royal Astronomical Society
- volume
- 480
- issue
- 3
- pages
- 8 pages
- publisher
- Oxford University Press
- external identifiers
-
- scopus:85054277184
- ISSN
- 0035-8711
- DOI
- 10.1093/MNRAS/STY2077
- language
- English
- LU publication?
- yes
- id
- d4aecebf-fef6-45fc-9d26-f71e74f63d4a
- date added to LUP
- 2019-04-29 13:31:55
- date last changed
- 2024-04-02 00:30:45
@article{d4aecebf-fef6-45fc-9d26-f71e74f63d4a, abstract = {{<p>The solar neighbourhood contains disc stars that have recently crossed spiral arms in the Galaxy. We propose that boundaries in local velocity distributions separate stars that have recently crossed and been more strongly perturbed by a particular arm from those that haven't. Ridges in the stellar velocity distributions constructed from the second Gaia data release trace orbits that could have touched nearby spiral arms at apocentre or pericentre. The multiple ridges and arcs seen in local velocity distributions are consistent with the presence of multiple spiral features and different pattern speeds and imply that the outer Galaxy is flocculent rather than grand design.</p>}}, author = {{Quillen, Alice C. and Carrillo, Ismael and Anders, Friedrich and McMillan, Paul and Hilmi, Tariq and Monari, Giacomo and Minchev, Ivan and Chiappini, Cristina and Khalatyan, Arman and Steinmetz, Matthias}}, issn = {{0035-8711}}, keywords = {{Galaxy: kinematics and dynamics}}, language = {{eng}}, number = {{3}}, pages = {{3132--3139}}, publisher = {{Oxford University Press}}, series = {{Monthly Notices of the Royal Astronomical Society}}, title = {{Spiral arm crossings inferred from ridges in Gaia stellar velocity distributions}}, url = {{http://dx.doi.org/10.1093/MNRAS/STY2077}}, doi = {{10.1093/MNRAS/STY2077}}, volume = {{480}}, year = {{2018}}, }