Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2409.10013 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866913501477339136 |
|---|---|
| author | Perrotta, Serena Coil, Alison L. Rupke, David S. N. Ning, Wenmeng Duong, Brendan Diamond-Stanic, Aleksandar M. Fielding, Drummond B. Geach, James E. Hickox, Ryan C. Moustakas, John Rudnick, Gregory H. Sell, Paul H. Swiggum, Cameren N. Tremonti, Christy A. |
| author_facet | Perrotta, Serena Coil, Alison L. Rupke, David S. N. Ning, Wenmeng Duong, Brendan Diamond-Stanic, Aleksandar M. Fielding, Drummond B. Geach, James E. Hickox, Ryan C. Moustakas, John Rudnick, Gregory H. Sell, Paul H. Swiggum, Cameren N. Tremonti, Christy A. |
| contents | High-velocity outflows are ubiquitous in compact, massive (M$_* \sim$ 10$^{11}$ M$_{\odot}$), z $\sim$ 0.5 galaxies with extreme star formation surface densities ($Σ_{SFR} \sim$ 2000 M$_{\odot}$ yr$^{-1}$ kpc$^{-2}$). We have previously detected and characterized these outflows using MgII absorption lines. To probe their full extent, we present Keck/KCWI integral field spectroscopy of the [OII] and MgII emission nebulae surrounding all of the 12 galaxies in this study. We find that [OII] is more effective than MgII in tracing low surface brightness, extended emission in these galaxies. The [OII] nebulae are spatially extended beyond the stars, with radial extent R$_{90}$ between 10 and 40 kpc. The nebulae exhibit non-gravitational motions, indicating galactic outflows with maximum blueshifted velocities ranging from -335 to -1920 km s$^{-1}$. The outflow kinematics correlate with the bursty star formation histories of these galaxies. Galaxies with the most recent bursts of star formation (within the last $<$ 3 Myr) exhibit the highest central velocity dispersions ($σ>$ 400 km s$^{-1}$), while the oldest bursts have the lowest-velocity outflows. Many galaxies exhibit both high-velocity cores and more extended, slower-moving gas indicative of multiple outflow episodes. The slower, larger outflows occurred earlier and have decelerated as they propagate into the CGM and mix on timescales $>$ 50 Myr. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10013 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Outflowing [OII] Nebulae of Compact Starburst Galaxies at z $\sim$ 0.5 Perrotta, Serena Coil, Alison L. Rupke, David S. N. Ning, Wenmeng Duong, Brendan Diamond-Stanic, Aleksandar M. Fielding, Drummond B. Geach, James E. Hickox, Ryan C. Moustakas, John Rudnick, Gregory H. Sell, Paul H. Swiggum, Cameren N. Tremonti, Christy A. Astrophysics of Galaxies High-velocity outflows are ubiquitous in compact, massive (M$_* \sim$ 10$^{11}$ M$_{\odot}$), z $\sim$ 0.5 galaxies with extreme star formation surface densities ($Σ_{SFR} \sim$ 2000 M$_{\odot}$ yr$^{-1}$ kpc$^{-2}$). We have previously detected and characterized these outflows using MgII absorption lines. To probe their full extent, we present Keck/KCWI integral field spectroscopy of the [OII] and MgII emission nebulae surrounding all of the 12 galaxies in this study. We find that [OII] is more effective than MgII in tracing low surface brightness, extended emission in these galaxies. The [OII] nebulae are spatially extended beyond the stars, with radial extent R$_{90}$ between 10 and 40 kpc. The nebulae exhibit non-gravitational motions, indicating galactic outflows with maximum blueshifted velocities ranging from -335 to -1920 km s$^{-1}$. The outflow kinematics correlate with the bursty star formation histories of these galaxies. Galaxies with the most recent bursts of star formation (within the last $<$ 3 Myr) exhibit the highest central velocity dispersions ($σ>$ 400 km s$^{-1}$), while the oldest bursts have the lowest-velocity outflows. Many galaxies exhibit both high-velocity cores and more extended, slower-moving gas indicative of multiple outflow episodes. The slower, larger outflows occurred earlier and have decelerated as they propagate into the CGM and mix on timescales $>$ 50 Myr. |
| title | The Outflowing [OII] Nebulae of Compact Starburst Galaxies at z $\sim$ 0.5 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2409.10013 |