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 Environments (E...
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ftcaltechauth:oai:authors.library.caltech.edu:83795 2023-05-15T18:11:48+02:00 The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations Tescari, E. Medling, A. M. 2018-01-01 application/pdf https://authors.library.caltech.edu/83795/ https://authors.library.caltech.edu/83795/1/stx2315.pdf https://authors.library.caltech.edu/83795/2/1709.01939.pdf https://resolver.caltech.edu/CaltechAUTHORS:20171211-103430700 en eng Royal Astronomical Society https://authors.library.caltech.edu/83795/1/stx2315.pdf https://authors.library.caltech.edu/83795/2/1709.01939.pdf Tescari, E. and Medling, A. M. (2018) The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations. Monthly Notices of the Royal Astronomical Society, 473 (1). pp. 380-397. ISSN 0035-8711. doi:10.1093/mnras/stx2315. https://resolver.caltech.edu/CaltechAUTHORS:20171211-103430700 <https://resolver.caltech.edu/CaltechAUTHORS:20171211-103430700> other Article PeerReviewed 2018 ftcaltechauth https://doi.org/10.1093/mnras/stx2315 2021-11-18T18:44:33Z 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. Article in Journal/Newspaper sami Caltech Authors (California Institute of Technology) Monthly Notices of the Royal Astronomical Society 473 1 380 397 |
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Caltech Authors (California Institute of Technology) |
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English |
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. |
format |
Article in Journal/Newspaper |
author |
Tescari, E. Medling, A. M. |
spellingShingle |
Tescari, E. Medling, A. M. The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
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://authors.library.caltech.edu/83795/ https://authors.library.caltech.edu/83795/1/stx2315.pdf https://authors.library.caltech.edu/83795/2/1709.01939.pdf https://resolver.caltech.edu/CaltechAUTHORS:20171211-103430700 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://authors.library.caltech.edu/83795/1/stx2315.pdf https://authors.library.caltech.edu/83795/2/1709.01939.pdf Tescari, E. and Medling, A. M. (2018) The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations. Monthly Notices of the Royal Astronomical Society, 473 (1). pp. 380-397. ISSN 0035-8711. doi:10.1093/mnras/stx2315. https://resolver.caltech.edu/CaltechAUTHORS:20171211-103430700 <https://resolver.caltech.edu/CaltechAUTHORS:20171211-103430700> |
op_rights |
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 |
_version_ |
1766184420779229184 |