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Chemodynamics of dwarf galaxies under ram pressure

Chemodynamics of dwarf galaxies under ram pressure
Chemodynamics of dwarf galaxies under ram pressure

By implementing a dynamic wind tunnel model in a smoothed particle chemodynamic/hydrodynamic simulation suite, we have investigated the effects of ram pressure and tidal forces on dwarf galaxies similar to the Magellanic Clouds, within host galaxies with gas and dark matter halos that are varied, to compare the relative effects of tides and ram pressure. We concentrate on how the distributions of metals are affected by interactions. We find that while ram pressure and tidal forces have some effect on dwarf galaxy outflows, these effects do not produce large differences in the metal distributions of the dwarf disks, other than truncation in the outer regions in some cases, and that confinement from the host galaxy gas halo appears to be more significant than ram pressure stripping. We find that stochastic variations in the star formation rate can explain the remaining variations in disk metal properties. This raises questions on the cause of low metallicities in dwarf galaxies.

diffusion, galaxies: abundances, galaxies: dwarf, galaxies: evolution, galaxies: interactions
0004-637X
1-11
Williamson, David
140b2434-b216-4237-8a78-9950b01319b5
Martel, Hugo
f76bfedd-0c4d-4ea7-a367-bd7ea0474e53
Williamson, David
140b2434-b216-4237-8a78-9950b01319b5
Martel, Hugo
f76bfedd-0c4d-4ea7-a367-bd7ea0474e53

Williamson, David and Martel, Hugo (2018) Chemodynamics of dwarf galaxies under ram pressure. Astrophysical Journal, 867 (1), 1-11, [72]. (doi:10.3847/1538-4357/aae538).

Record type: Article

Abstract

By implementing a dynamic wind tunnel model in a smoothed particle chemodynamic/hydrodynamic simulation suite, we have investigated the effects of ram pressure and tidal forces on dwarf galaxies similar to the Magellanic Clouds, within host galaxies with gas and dark matter halos that are varied, to compare the relative effects of tides and ram pressure. We concentrate on how the distributions of metals are affected by interactions. We find that while ram pressure and tidal forces have some effect on dwarf galaxy outflows, these effects do not produce large differences in the metal distributions of the dwarf disks, other than truncation in the outer regions in some cases, and that confinement from the host galaxy gas halo appears to be more significant than ram pressure stripping. We find that stochastic variations in the star formation rate can explain the remaining variations in disk metal properties. This raises questions on the cause of low metallicities in dwarf galaxies.

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Chemodynamics of Dwarf Galaxies under Ram Pressure - Accepted Manuscript
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More information

Accepted/In Press date: 27 September 2018
e-pub ahead of print date: 1 November 2018
Published date: 1 November 2018
Additional Information: Author Williamson has confirmed that Arxiv record is AM
Keywords: diffusion, galaxies: abundances, galaxies: dwarf, galaxies: evolution, galaxies: interactions

Identifiers

Local EPrints ID: 426814
URI: http://eprints.soton.ac.uk/id/eprint/426814
ISSN: 0004-637X
PURE UUID: d5ffe2e7-4170-4315-bd11-d8cea5cd575f
ORCID for David Williamson: ORCID iD orcid.org/0000-0002-5168-7979

Catalogue record

Date deposited: 12 Dec 2018 17:32
Last modified: 26 Nov 2021 03:09

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Contributors

Author: Hugo Martel

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