The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations
This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 10^9 ≤ M⋆/ M⊙ ≤ 5.7 × 10^(10) at redshift z = 0 from the highest resolution cosmological simulation of the Evolution and Assembly of GaLaxies and their Enviro...
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ftcaltechauth:oai:authors.library.caltech.edu:c0yq0-z4y02 2024-10-13T14:10:36+00:00 The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations Tescari, E. Medling, A. M. 2018-01-01 https://doi.org/10.1093/mnras/stx2315 unknown Royal Astronomical Society https://arxiv.org/abs/1709.01939 https://doi.org/10.1093/mnras/stx2315 eprintid:83795 info:eu-repo/semantics/openAccess Other Monthly Notices of the Royal Astronomical Society, 473(1), 380-397, (2018-01-01) methods: numerical – galaxies: evolution – galaxies: kinematics and dynamics info:eu-repo/semantics/article 2018 ftcaltechauth https://doi.org/10.1093/mnras/stx2315 2024-09-25T18:46:36Z This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 10^9 ≤ M⋆/ M⊙ ≤ 5.7 × 10^(10) at redshift z = 0 from the highest resolution cosmological simulation of the Evolution and Assembly of GaLaxies and their Environments (EAGLE) set. Synthetic gas rotation velocity and velocity dispersion (σ) maps are created and compared to observations of disc galaxies obtained with the Sydney-AAO (Australian Astronomical Observatory) Multi-object Integral field spectrograph (SAMI), where σ-values greater than 150 km s^(−1) are most naturally explained by bipolar outflows powered by starburst activity. We find that the extension of the simulated edge-on (pixelated) velocity dispersion probability distribution depends on stellar mass and star formation rate surface density (Σ_(SFR)), with low-M⋆/low-Σ_(SFR) galaxies showing a narrow peak at low σ (∼30 km s^(−1)) and more active, high-M⋆/high-Σ_(SFR) galaxies reaching σ > 150 km s^(−1). Although supernova-driven galactic winds in the EAGLE simulations may not entrain enough gas with T <10^5 K compared to observed galaxies, we find that gas temperature is a good proxy for the presence of outflows. There is a direct correlation between the thermal state of the gas and its state of motion as described by the σ-distribution. The following equivalence relations hold in EAGLE: (i) low-σ peak  ⇔ disc of the galaxy  ⇔ gas with T <10^5 K; (ii) high-σ tail  ⇔ galactic winds  ⇔ gas with T ≥10^5 K. © 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 September 5. Received 2017 September 4; in original form 2016 December 5. Published: 09 September 2017. ET would like to thank Lemmy Kilmister for constant inspiration during the writing of this paper and Jeremy Mould & Paul Geil for many insightful discussions. RAC is a Royal Society University Research Fellow. SMC ... Article in Journal/Newspaper sami Caltech Authors (California Institute of Technology) Jeremy ENVELOPE(-68.838,-68.838,-69.402,-69.402) Monthly Notices of the Royal Astronomical Society 473 1 380 397 |
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methods: numerical – galaxies: evolution – galaxies: kinematics and dynamics |
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methods: numerical – galaxies: evolution – galaxies: kinematics and dynamics Tescari, E. Medling, A. M. The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
topic_facet |
methods: numerical – galaxies: evolution – galaxies: kinematics and dynamics |
description |
This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 10^9 ≤ M⋆/ M⊙ ≤ 5.7 × 10^(10) at redshift z = 0 from the highest resolution cosmological simulation of the Evolution and Assembly of GaLaxies and their Environments (EAGLE) set. Synthetic gas rotation velocity and velocity dispersion (σ) maps are created and compared to observations of disc galaxies obtained with the Sydney-AAO (Australian Astronomical Observatory) Multi-object Integral field spectrograph (SAMI), where σ-values greater than 150 km s^(−1) are most naturally explained by bipolar outflows powered by starburst activity. We find that the extension of the simulated edge-on (pixelated) velocity dispersion probability distribution depends on stellar mass and star formation rate surface density (Σ_(SFR)), with low-M⋆/low-Σ_(SFR) galaxies showing a narrow peak at low σ (∼30 km s^(−1)) and more active, high-M⋆/high-Σ_(SFR) galaxies reaching σ > 150 km s^(−1). Although supernova-driven galactic winds in the EAGLE simulations may not entrain enough gas with T <10^5 K compared to observed galaxies, we find that gas temperature is a good proxy for the presence of outflows. There is a direct correlation between the thermal state of the gas and its state of motion as described by the σ-distribution. The following equivalence relations hold in EAGLE: (i) low-σ peak  ⇔ disc of the galaxy  ⇔ gas with T <10^5 K; (ii) high-σ tail  ⇔ galactic winds  ⇔ gas with T ≥10^5 K. © 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 September 5. Received 2017 September 4; in original form 2016 December 5. Published: 09 September 2017. ET would like to thank Lemmy Kilmister for constant inspiration during the writing of this paper and Jeremy Mould & Paul Geil for many insightful discussions. RAC is a Royal Society University Research Fellow. SMC ... |
format |
Article in Journal/Newspaper |
author |
Tescari, E. Medling, A. M. |
author_facet |
Tescari, E. Medling, A. M. |
author_sort |
Tescari, E. |
title |
The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
title_short |
The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
title_full |
The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
title_fullStr |
The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
title_full_unstemmed |
The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
title_sort |
sami galaxy survey: understanding observations of large-scale outflows at low redshift with eagle simulations |
publisher |
Royal Astronomical Society |
publishDate |
2018 |
url |
https://doi.org/10.1093/mnras/stx2315 |
long_lat |
ENVELOPE(-68.838,-68.838,-69.402,-69.402) |
geographic |
Jeremy |
geographic_facet |
Jeremy |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, 473(1), 380-397, (2018-01-01) |
op_relation |
https://arxiv.org/abs/1709.01939 https://doi.org/10.1093/mnras/stx2315 eprintid:83795 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1093/mnras/stx2315 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
473 |
container_issue |
1 |
container_start_page |
380 |
op_container_end_page |
397 |
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1812817920514850816 |