The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations
Abstract This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 109 ≤ M⋆/ M⊙ ≤ 5.7 × 1010 at redshift z = 0 from the highest resolution cosmological simulation of the Evolution and Assembly of GaLaxies and their Environmen...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press (OUP)
2017
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Online Access: | http://dx.doi.org/10.1093/mnras/stx2315 https://academic.oup.com/mnras/article-pdf/473/1/380/49204106/mnras_473_1_380.pdf |
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croxfordunivpr:10.1093/mnras/stx2315 2024-01-21T10:10:12+01:00 The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations Tescari, E. Cortese, L. Power, C. Wyithe, J. S. B. Ho, I.-T. Crain, R. A. Bland-Hawthorn, J. Croom, S. M. Kewley, L. J. Schaye, J. Bower, R. G. Theuns, T. Schaller, M. Barnes, L. Brough, S. Bryant, J. J. Goodwin, M. Gunawardhana, M. L. P. Lawrence, J. S. Leslie, S. K. López-Sánchez, Á. R. Lorente, N. P. F. Medling, A. M. Richards, S. N. Sweet, S. M. Tonini, C. NASA Department for Business, Innovation and Skills STFC 2017 http://dx.doi.org/10.1093/mnras/stx2315 https://academic.oup.com/mnras/article-pdf/473/1/380/49204106/mnras_473_1_380.pdf en eng Oxford University Press (OUP) Monthly Notices of the Royal Astronomical Society volume 473, issue 1, page 380-397 ISSN 0035-8711 1365-2966 Space and Planetary Science Astronomy and Astrophysics journal-article 2017 croxfordunivpr https://doi.org/10.1093/mnras/stx2315 2023-12-22T10:02:15Z Abstract This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 109 ≤ M⋆/ M⊙ ≤ 5.7 × 1010 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 (ΣSFR), with low-M⋆/low-ΣSFR galaxies showing a narrow peak at low σ (∼30 km s−1) and more active, high-M⋆/high-ΣSFR galaxies reaching σ > 150 km s−1. Although supernova-driven galactic winds in the EAGLE simulations may not entrain enough gas with T <105 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 <105 K; (ii) high-σ tail ⇔ galactic winds ⇔ gas with T ≥105 K. Article in Journal/Newspaper sami Oxford University Press (via Crossref) Monthly Notices of the Royal Astronomical Society 473 1 380 397 |
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Open Polar |
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Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
spellingShingle |
Space and Planetary Science Astronomy and Astrophysics Tescari, E. Cortese, L. Power, C. Wyithe, J. S. B. Ho, I.-T. Crain, R. A. Bland-Hawthorn, J. Croom, S. M. Kewley, L. J. Schaye, J. Bower, R. G. Theuns, T. Schaller, M. Barnes, L. Brough, S. Bryant, J. J. Goodwin, M. Gunawardhana, M. L. P. Lawrence, J. S. Leslie, S. K. López-Sánchez, Á. R. Lorente, N. P. F. Medling, A. M. Richards, S. N. Sweet, S. M. Tonini, C. The SAMI Galaxy Survey: understanding observations of large-scale outflows at low redshift with EAGLE simulations |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
Abstract This work presents a study of galactic outflows driven by stellar feedback. We extract main-sequence disc galaxies with stellar mass 109 ≤ M⋆/ M⊙ ≤ 5.7 × 1010 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 (ΣSFR), with low-M⋆/low-ΣSFR galaxies showing a narrow peak at low σ (∼30 km s−1) and more active, high-M⋆/high-ΣSFR galaxies reaching σ > 150 km s−1. Although supernova-driven galactic winds in the EAGLE simulations may not entrain enough gas with T <105 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 <105 K; (ii) high-σ tail ⇔ galactic winds ⇔ gas with T ≥105 K. |
author2 |
NASA Department for Business, Innovation and Skills STFC |
format |
Article in Journal/Newspaper |
author |
Tescari, E. Cortese, L. Power, C. Wyithe, J. S. B. Ho, I.-T. Crain, R. A. Bland-Hawthorn, J. Croom, S. M. Kewley, L. J. Schaye, J. Bower, R. G. Theuns, T. Schaller, M. Barnes, L. Brough, S. Bryant, J. J. Goodwin, M. Gunawardhana, M. L. P. Lawrence, J. S. Leslie, S. K. López-Sánchez, Á. R. Lorente, N. P. F. Medling, A. M. Richards, S. N. Sweet, S. M. Tonini, C. |
author_facet |
Tescari, E. Cortese, L. Power, C. Wyithe, J. S. B. Ho, I.-T. Crain, R. A. Bland-Hawthorn, J. Croom, S. M. Kewley, L. J. Schaye, J. Bower, R. G. Theuns, T. Schaller, M. Barnes, L. Brough, S. Bryant, J. J. Goodwin, M. Gunawardhana, M. L. P. Lawrence, J. S. Leslie, S. K. López-Sánchez, Á. R. Lorente, N. P. F. Medling, A. M. Richards, S. N. Sweet, S. M. Tonini, C. |
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 |
Oxford University Press (OUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1093/mnras/stx2315 https://academic.oup.com/mnras/article-pdf/473/1/380/49204106/mnras_473_1_380.pdf |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society volume 473, issue 1, page 380-397 ISSN 0035-8711 1365-2966 |
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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1788701442281832448 |