Semczuk, Marcin;
Dehnen, Walter;
Schönrich, Ralph;
Athanassoula, E;
(2022)
Age-morphology dependence of the Milky Way boxy/peanut bulge seen in Mira variables.
Monthly Notices of the Royal Astronomical Society
, 517
(4)
pp. 6060-6063.
10.1093/mnras/stac3085.
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Abstract
We analyse the distribution of Mira variable stars in the central region of the Milky Way. We find that with increasing period, i.e. decreasing age, the Miras shift towards negative Galactic longitudes ℓ. Comparing to a cosmological zoom simulation of a barred galaxy, we find that this shift with age can be explained by an age-morphology dependence of the boxy peanut/bulge. Owing to a combination of projection effects and the limitation of the range of Galactic longitudes, the near hump at ℓ &gt; 0 is more truncated for younger populations, and the far hump at ℓ < 0 dominates the observed distributions.
| Type: | Article |
|---|---|
| Title: | Age-morphology dependence of the Milky Way boxy/peanut bulge seen in Mira variables |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stac3085 |
| Publisher version: | https://doi.org/10.1093/mnras/stac3085 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | stars: variables: general, Galaxy: bulge, Galaxy: evolution, 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.ucl.ac.uk/id/eprint/10159646 |
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