DUVET: sub-kiloparsec resolved star formation driven outflows in a sample of local starbursting disk galaxies
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2024
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| author | Chu, Bronwyn Reichardt Fisher, Deanne B. Chisholm, John Berg, Danielle Bolatto, Alberto Cameron, Alex J. Fielding, Drummond B. Herrera-Camus, Rodrigo Kacprzak, Glenn G. Li, Miao McLeod, Anna F. McPherson, Daniel K. Nielsen, Nikole M. Vaught, Ryan Rickards Ridolfo, Sophia G. Sandstrom, Karin |
| author_facet | Chu, Bronwyn Reichardt Fisher, Deanne B. Chisholm, John Berg, Danielle Bolatto, Alberto Cameron, Alex J. Fielding, Drummond B. Herrera-Camus, Rodrigo Kacprzak, Glenn G. Li, Miao McLeod, Anna F. McPherson, Daniel K. Nielsen, Nikole M. Vaught, Ryan Rickards Ridolfo, Sophia G. Sandstrom, Karin |
| contents | We measure resolved (kiloparsec-scale) outflow properties in a sample of 10 starburst galaxies from the DUVET (Deep near-UV observations of Entrained gas in Turbulent galaxies) sample, using Keck/KCWI observations of H$β$ and [OIII]~$λ$5007. We measure $\sim460$ lines-of-sight that contain outflows, and use these to study scaling relationships of outflow velocity ($v_{\rm out}$), mass-loading factor ($η$; mass outflow rate per SFR) and mass flux ($\dotΣ_{\rm out}$; mass outflow rate per area) with co-located SFR surface density ($Σ_{\rm SFR}$) and stellar mass surface density ($Σ_{\ast}$). We find strong, positive correlations of $\dotΣ_{\rm out} \propto Σ_{\rm SFR}^{1.2}$ and $\dotΣ_{\rm out} \propto Σ_{\ast}^{1.5}$. We also find shallow correlations between $v_{\rm out}$ and both $Σ_{\rm SFR}$ and $Σ_{\ast}$. Our resolved observations do not suggest a threshold in outflows with $Σ_{\rm SFR}$, but rather we find that the local specific SFR ($Σ_{\rm SFR}/Σ_\ast$) is a better predictor of where outflows are detected. We find that outflows are very common above $Σ_{\rm SFR}/Σ_\ast\gtrsim 0.1$~Gyr$^{-1}$ and rare below this value. We argue that our results are consistent with a picture in which outflows are driven by supernovae, and require more significant injected energy in higher mass surface density environments to overcome local gravity. The correlations we present here provide a statistically robust, direct comparison for simulations and higher redshift results from JWST. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_17830 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | DUVET: sub-kiloparsec resolved star formation driven outflows in a sample of local starbursting disk galaxies Chu, Bronwyn Reichardt Fisher, Deanne B. Chisholm, John Berg, Danielle Bolatto, Alberto Cameron, Alex J. Fielding, Drummond B. Herrera-Camus, Rodrigo Kacprzak, Glenn G. Li, Miao McLeod, Anna F. McPherson, Daniel K. Nielsen, Nikole M. Vaught, Ryan Rickards Ridolfo, Sophia G. Sandstrom, Karin Astrophysics of Galaxies We measure resolved (kiloparsec-scale) outflow properties in a sample of 10 starburst galaxies from the DUVET (Deep near-UV observations of Entrained gas in Turbulent galaxies) sample, using Keck/KCWI observations of H$β$ and [OIII]~$λ$5007. We measure $\sim460$ lines-of-sight that contain outflows, and use these to study scaling relationships of outflow velocity ($v_{\rm out}$), mass-loading factor ($η$; mass outflow rate per SFR) and mass flux ($\dotΣ_{\rm out}$; mass outflow rate per area) with co-located SFR surface density ($Σ_{\rm SFR}$) and stellar mass surface density ($Σ_{\ast}$). We find strong, positive correlations of $\dotΣ_{\rm out} \propto Σ_{\rm SFR}^{1.2}$ and $\dotΣ_{\rm out} \propto Σ_{\ast}^{1.5}$. We also find shallow correlations between $v_{\rm out}$ and both $Σ_{\rm SFR}$ and $Σ_{\ast}$. Our resolved observations do not suggest a threshold in outflows with $Σ_{\rm SFR}$, but rather we find that the local specific SFR ($Σ_{\rm SFR}/Σ_\ast$) is a better predictor of where outflows are detected. We find that outflows are very common above $Σ_{\rm SFR}/Σ_\ast\gtrsim 0.1$~Gyr$^{-1}$ and rare below this value. We argue that our results are consistent with a picture in which outflows are driven by supernovae, and require more significant injected energy in higher mass surface density environments to overcome local gravity. The correlations we present here provide a statistically robust, direct comparison for simulations and higher redshift results from JWST. |
| title | DUVET: sub-kiloparsec resolved star formation driven outflows in a sample of local starbursting disk galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2402.17830 |