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Kawata, D, Gibson, BK, Barnes, DJ, Grand, RJJ and Rahimi, A (2013) Numerical simulations of bubble-induced star formation in dwarf irregular galaxies with a novel stellar feedback scheme. Monthly Notices of the Royal Astronomical Society, 438 (2). pp. 1208-1222. ISSN 0035-8711
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Numerical simulations of bubble-induced star formation in dwarf irregular galaxies with a novel stellar feedback scheme.pdf - Published Version Download (6MB) | Preview |
Abstract
To study the star formation and feedback mechanism, we simulate the evolution of an isolated dwarf irregular galaxy (dIrr) in a fixed dark matter halo, similar in size to Wolf-Lundmark- Melotte, using a new stellar feedback scheme. We use the new version of our original N-body/smoothed particle chemodynamics code, GCD+, which adopts improved hydrodynamics, metal diffusion between the gas particles and new modelling of star formation and stellar wind and supernovae feedback. Comparing the simulations with and without stellar feedback effects, we demonstrate that the collisions of bubbles produced by strong feedback can induce star formation in a more widely spread area. We also demonstrate that the metallicity in star-forming regions is kept low due to the mixing of the metal-rich bubbles and the metal-poor interstellar medium. Our simulations also suggest that the bubble-induced star formation leads to many counter-rotating stars. The bubble-induced star formation could be a dominant mechanism to maintain star formation in dIrrs, which is different from larger spiral galaxies where the non-axisymmetric structures, such as spiral arms, are a main driver of star formation. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
| Item Type: | Article |
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| Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Uncontrolled Keywords: | 0201 Astronomical and Space Sciences; Astronomy & Astrophysics |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | Oxford University Press (OUP) |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 19 Apr 2023 10:04 |
| Last Modified: | 19 Apr 2023 10:19 |
| DOI or ID number: | 10.1093/mnras/stt2267 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/19360 |
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