Observed Timescales of Stellar Feedback in Star-Forming, Low-Mass Galaxies
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918528186056704 |
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| author | Hunter, Laura C. van Zee, Liese Cohen, Roger E. McQuinn, Kristen B. Markham, Madison Kader, Justin A. Gault, Lexi N. Dolphin, Andrew E. |
| author_facet | Hunter, Laura C. van Zee, Liese Cohen, Roger E. McQuinn, Kristen B. Markham, Madison Kader, Justin A. Gault, Lexi N. Dolphin, Andrew E. |
| contents | Understanding the timescales of atomic gas turbulence is crucial to understanding the interplay between star formation and the interstellar medium (ISM). To investigate the timescales of turbulence low-mass galaxies ($10^{6.8}<M_\odot<10^9$), this study combines temporally resolved star formation histories (SFHs) -- derived from color-magnitude diagrams -- with kinematic data of the atomic and ionized hydrogen in a large sample of nearby, star-forming, low-mass galaxies. To best understand the timescales involved, SFHs and gas kinematics were analyzed in 400$\times$400 parsec regions to capture the local impacts of star formation. No strong correlation was found between the ionized gas velocity dispersion and the star formation activity over the past 5-500 Myr. In contrast, a consistent and significant correlation between the atomic hydrogen turbulence measures and the star formation activity t$\geq$100 Myr ago was identified. This correlation suggests the star formation activity and atomic gas are coupled on this timescale. This connection between star-formation activity $>$100 Myr ago, and the HI turbulence properties, may be related to the time scales over which turbulence decays in the ISM. Additionally, the results demonstrate a possible difference in the global and local turbulence properties of low-mass galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_19573 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observed Timescales of Stellar Feedback in Star-Forming, Low-Mass Galaxies Hunter, Laura C. van Zee, Liese Cohen, Roger E. McQuinn, Kristen B. Markham, Madison Kader, Justin A. Gault, Lexi N. Dolphin, Andrew E. Astrophysics of Galaxies Understanding the timescales of atomic gas turbulence is crucial to understanding the interplay between star formation and the interstellar medium (ISM). To investigate the timescales of turbulence low-mass galaxies ($10^{6.8}<M_\odot<10^9$), this study combines temporally resolved star formation histories (SFHs) -- derived from color-magnitude diagrams -- with kinematic data of the atomic and ionized hydrogen in a large sample of nearby, star-forming, low-mass galaxies. To best understand the timescales involved, SFHs and gas kinematics were analyzed in 400$\times$400 parsec regions to capture the local impacts of star formation. No strong correlation was found between the ionized gas velocity dispersion and the star formation activity over the past 5-500 Myr. In contrast, a consistent and significant correlation between the atomic hydrogen turbulence measures and the star formation activity t$\geq$100 Myr ago was identified. This correlation suggests the star formation activity and atomic gas are coupled on this timescale. This connection between star-formation activity $>$100 Myr ago, and the HI turbulence properties, may be related to the time scales over which turbulence decays in the ISM. Additionally, the results demonstrate a possible difference in the global and local turbulence properties of low-mass galaxies. |
| title | Observed Timescales of Stellar Feedback in Star-Forming, Low-Mass Galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2507.19573 |