The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6
The rapid decline in the average star formation activity of galaxies from z~2.6 to z~0 is accompanied by an order of magnitude decrease in the typical electron densities of HII regions. However, it is unclear what connects the pc-scale properties of the line-emitting gas with the global properties o...
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ftsmithonian:oai:figshare.com:article/14493909 2023-05-15T18:11:35+02:00 The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 Davies, Rebecca (6471698) 2021-04-26T00:00:00Z https://doi.org/10.5281/zenodo.4721896 unknown https://figshare.com/articles/presentation/The_Connection_Between_Galaxy_Star_Formation_Rates_and_HII_Region_Electron_Densities_at_0_z_2_6/14493909 doi:10.5281/zenodo.4721896 CC BY 4.0 CC-BY Biophysics Medicine Microbiology Physiology Evolutionary Biology Ecology Marine Biology Computational Biology Environmental Sciences not elsewhere classified Physical Sciences not elsewhere classified electron density evolution volume-averaged electron density Galaxy Star Formation Rates galaxy HII Region Electron Densities lt KMOS star formation activity SAMI HII regions Text Presentation 2021 ftsmithonian https://doi.org/10.5281/zenodo.4721896 2021-05-05T17:22:43Z The rapid decline in the average star formation activity of galaxies from z~2.6 to z~0 is accompanied by an order of magnitude decrease in the typical electron densities of HII regions. However, it is unclear what connects the pc-scale properties of the line-emitting gas with the global properties of the host galaxies. I will summarize unique new results from a study of 611 galaxies at 0 < z < 2.6, drawn primarily from the KMOS^3D and SAMI surveys. We measure both the local electron density of the lineemitting gas and the volume-averaged electron density across the starforming disks at four different redshifts, yielding unique constraints on the volume filling factor and evolving spatial distribution of ionized gas in HII regions. We compare our measurements to quantitative predictions to evaluate whether the electron density evolution is most likely to be driven by changes in the strength of stellar feedback, the molecular cloud density, and/or the hydrostatic equilibrium pressure. Conference Object sami Unknown |
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ftsmithonian |
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topic |
Biophysics Medicine Microbiology Physiology Evolutionary Biology Ecology Marine Biology Computational Biology Environmental Sciences not elsewhere classified Physical Sciences not elsewhere classified electron density evolution volume-averaged electron density Galaxy Star Formation Rates galaxy HII Region Electron Densities lt KMOS star formation activity SAMI HII regions |
spellingShingle |
Biophysics Medicine Microbiology Physiology Evolutionary Biology Ecology Marine Biology Computational Biology Environmental Sciences not elsewhere classified Physical Sciences not elsewhere classified electron density evolution volume-averaged electron density Galaxy Star Formation Rates galaxy HII Region Electron Densities lt KMOS star formation activity SAMI HII regions Davies, Rebecca (6471698) The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 |
topic_facet |
Biophysics Medicine Microbiology Physiology Evolutionary Biology Ecology Marine Biology Computational Biology Environmental Sciences not elsewhere classified Physical Sciences not elsewhere classified electron density evolution volume-averaged electron density Galaxy Star Formation Rates galaxy HII Region Electron Densities lt KMOS star formation activity SAMI HII regions |
description |
The rapid decline in the average star formation activity of galaxies from z~2.6 to z~0 is accompanied by an order of magnitude decrease in the typical electron densities of HII regions. However, it is unclear what connects the pc-scale properties of the line-emitting gas with the global properties of the host galaxies. I will summarize unique new results from a study of 611 galaxies at 0 < z < 2.6, drawn primarily from the KMOS^3D and SAMI surveys. We measure both the local electron density of the lineemitting gas and the volume-averaged electron density across the starforming disks at four different redshifts, yielding unique constraints on the volume filling factor and evolving spatial distribution of ionized gas in HII regions. We compare our measurements to quantitative predictions to evaluate whether the electron density evolution is most likely to be driven by changes in the strength of stellar feedback, the molecular cloud density, and/or the hydrostatic equilibrium pressure. |
format |
Conference Object |
author |
Davies, Rebecca (6471698) |
author_facet |
Davies, Rebecca (6471698) |
author_sort |
Davies, Rebecca (6471698) |
title |
The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 |
title_short |
The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 |
title_full |
The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 |
title_fullStr |
The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 |
title_full_unstemmed |
The Connection Between Galaxy Star Formation Rates and HII Region Electron Densities at 0 < z < 2.6 |
title_sort |
connection between galaxy star formation rates and hii region electron densities at 0 < z < 2.6 |
publishDate |
2021 |
url |
https://doi.org/10.5281/zenodo.4721896 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://figshare.com/articles/presentation/The_Connection_Between_Galaxy_Star_Formation_Rates_and_HII_Region_Electron_Densities_at_0_z_2_6/14493909 doi:10.5281/zenodo.4721896 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5281/zenodo.4721896 |
_version_ |
1766184232821981184 |