Skip to main content

Research Repository

Advanced Search

2D-Galactic chemical evolution: The role of the spiral density wave

Mollá, M.; Wekesa, S.; Cavichia, O.; Díaz, I.; Gibson, B. K.; Rosales-Ortega, F. F.; Ascasibar, Y.; Wamalwa, D. S.; Sánchez, S. F.

Authors

M. Mollá

S. Wekesa

O. Cavichia

I. Díaz

B. K. Gibson

F. F. Rosales-Ortega

Y. Ascasibar

D. S. Wamalwa

S. F. Sánchez



Abstract

© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a 2D chemical evolution code applied to a Milky Way type Galaxy, incorporating the role of spiral arms in shaping azimuthal abundance variations, and confront the predicted behaviour with recent observations taken with integral field units. To the usual radial distribution of mass, we add the surface density of the spiral wave and study its effect on star formation and elemental abundances. We compute five different models: one with azimuthal symmetry which depends only on radius, while the other four are subjected to the effect of a spiral density wave. At early times, the imprint of the spiral density wave is carried by both the stellar and star formation surface densities; conversely, the elemental abundance pattern is less affected. At later epochs, however, differences among the models are diluted, becoming almost indistinguishable given current observational uncertainties. At the present time, the largest differences appear in the star formation rate and/or in the outer disc (R ≥ 18 kpc). The predicted azimuthal oxygen abundance patterns for t ≤ 2 Gyr are in reasonable agreement with recent observations obtained with VLT/MUSE for NGC 6754.

Citation

Mollá, M., Wekesa, S., Cavichia, O., Díaz, I., Gibson, B. K., Rosales-Ortega, F. F., …Sánchez, S. F. (2019). 2D-Galactic chemical evolution: The role of the spiral density wave. Monthly notices of the Royal Astronomical Society, 490(1), 665-682. https://doi.org/10.1093/mnras/stz2537

Journal Article Type Article
Acceptance Date Sep 4, 2019
Online Publication Date Sep 15, 2019
Publication Date 2019-11
Deposit Date Feb 1, 2021
Publicly Available Date Mar 29, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 490
Issue 1
Pages 665-682
DOI https://doi.org/10.1093/mnras/stz2537
Keywords Galaxy: abundances; Galaxies: spiral; Galaxies: star formation
Public URL https://hull-repository.worktribe.com/output/3275058

Files

Published article (6.7 Mb)
PDF

Copyright Statement
© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record M Mollá, S Wekesa, O Cavichia, Á I Díaz, B K Gibson, F F Rosales-Ortega, Y Ascasibar, D S Wamalwa, S F Sánchez, 2D-Galactic chemical evolution: the role of the spiral density wave, Monthly Notices of the Royal Astronomical Society, Volume 490, Issue 1, November 2019, Pages 665–682, is available online at: https://doi.org/10.1093/mnras/stz2537







You might also like



Downloadable Citations