The DUVET Survey: Resolved Maps of Star Formation Driven Outflows in a Compact, Starbursting Disk Galaxy
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| Natura: | Preprint |
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2022
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| author | Chu, Bronwyn Reichardt Fisher, Deanne B. Nielsen, Nikole M. Chisholm, John Girard, Marianne Kacprzak, Glenn G. Bolatto, Alberto Herrara-Camus, Rodrigo Sandstrom, Karin Li, Miao Vaught, Ryan Rickards McPherson, Daniel K. |
| author_facet | Chu, Bronwyn Reichardt Fisher, Deanne B. Nielsen, Nikole M. Chisholm, John Girard, Marianne Kacprzak, Glenn G. Bolatto, Alberto Herrara-Camus, Rodrigo Sandstrom, Karin Li, Miao Vaught, Ryan Rickards McPherson, Daniel K. |
| contents | We study star formation driven outflows in a $z\sim0.02$ starbursting disk galaxy, IRAS08339+6517, using spatially resolved measurements from the Keck Cosmic Web Imager (KCWI). We develop a new method incorporating a multi-step process to determine whether an outflow should be fit in each spaxel, and then subsequently decompose the emission line into multiple components. We detect outflows ranging in velocity, $v_{\rm out}$, from $100-600$ km s$^{-1}$ across a range of star formation rate surface densities, $Σ_{\rm SFR}$, from $\sim$0.01-10 M$_\odot$ yr$^{-1}$ kpc$^{-2}$ in resolution elements of a few hundred parsec. Outflows are detected in $\sim100\%$ of all spaxels within the half-light radius, and $\sim70\%$ within $r_{90}$, suggestive of a high covering fraction for this starbursting disk galaxy. Around $2/3$ of the total outflowing mass originates from the star forming ring, which corresponds to $<10\%$ of the total area of the galaxy. We find that the relationship between $v_{\rm out}$ and the $Σ_{\rm SFR}$, as well as between the mass loading factor, $η$, and the $Σ_{\rm SFR}$, are consistent with trends expected from energy-driven feedback models. We study the resolution effects on this relationship and find stronger correlations above a re-binned size-scale of $\sim500$ pc. Conversely, we do not find statistically significant consistency with the prediction from momentum-driven winds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2202_04672 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | The DUVET Survey: Resolved Maps of Star Formation Driven Outflows in a Compact, Starbursting Disk Galaxy Chu, Bronwyn Reichardt Fisher, Deanne B. Nielsen, Nikole M. Chisholm, John Girard, Marianne Kacprzak, Glenn G. Bolatto, Alberto Herrara-Camus, Rodrigo Sandstrom, Karin Li, Miao Vaught, Ryan Rickards McPherson, Daniel K. Astrophysics of Galaxies We study star formation driven outflows in a $z\sim0.02$ starbursting disk galaxy, IRAS08339+6517, using spatially resolved measurements from the Keck Cosmic Web Imager (KCWI). We develop a new method incorporating a multi-step process to determine whether an outflow should be fit in each spaxel, and then subsequently decompose the emission line into multiple components. We detect outflows ranging in velocity, $v_{\rm out}$, from $100-600$ km s$^{-1}$ across a range of star formation rate surface densities, $Σ_{\rm SFR}$, from $\sim$0.01-10 M$_\odot$ yr$^{-1}$ kpc$^{-2}$ in resolution elements of a few hundred parsec. Outflows are detected in $\sim100\%$ of all spaxels within the half-light radius, and $\sim70\%$ within $r_{90}$, suggestive of a high covering fraction for this starbursting disk galaxy. Around $2/3$ of the total outflowing mass originates from the star forming ring, which corresponds to $<10\%$ of the total area of the galaxy. We find that the relationship between $v_{\rm out}$ and the $Σ_{\rm SFR}$, as well as between the mass loading factor, $η$, and the $Σ_{\rm SFR}$, are consistent with trends expected from energy-driven feedback models. We study the resolution effects on this relationship and find stronger correlations above a re-binned size-scale of $\sim500$ pc. Conversely, we do not find statistically significant consistency with the prediction from momentum-driven winds. |
| title | The DUVET Survey: Resolved Maps of Star Formation Driven Outflows in a Compact, Starbursting Disk Galaxy |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2202.04672 |