Kawata, D;
(2017)
Impacts of Radial Mixing on the Galactic Thick and Thin Disks.
In:
Proceedings of the International Astronomical Union - No. 334, 2017.
(pp. pp. 132-135).
Cambridge University Press: Cambridge, UK.
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Abstract
Using N-body simulations of the Galactic disks, we qualitatively study how the metallicity distributions of the thick and thin disk stars are modified by radial mixing induced by the bar and spiral arms. We show that radial mixing drives a positive vertical metallicity gradient in the mono-age disk population whose initial scale-height is constant and initial radial metallicity gradient is tight and negative. On the other hand, if the initial disk is flaring, with scale-height increasing with galactocentric radius, radial mixing leads to a negative vertical metallicity gradient, which is consistent with the current observed trend. We also discuss impacts of radial mixing on the metallicity distribution of the thick disk stars. By matching the metallicity distribution of N-body models to the SDSS/APOGEE data, we argue that the progenitor of the Milky Way's thick disk should not have a steep negative metallicity gradient.
Type: | Proceedings paper |
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Title: | Impacts of Radial Mixing on the Galactic Thick and Thin Disks |
Event: | International Astronomical Union - No. 334, 2017 |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1017/S1743921317007517 |
Publisher version: | https://doi.org/10.1017/S1743921317007517 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | astro-ph.GA, astro-ph.GA |
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/1571374 |
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