Stellar Populations and Molecular Gas Composition in the Low-Metallicity Environment of WLM
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Archer, Haylee N. Hunter, Deidre A. Elmegreen, Bruce G. Hunt, Leslie K. O'brien, Rosalia Brinks, Elias Cigan, Phil Rubio, Monica Windhorst, Rogier A. Jansen, Rolf A. Mathews, Elijah P. |
| author_facet | Archer, Haylee N. Hunter, Deidre A. Elmegreen, Bruce G. Hunt, Leslie K. O'brien, Rosalia Brinks, Elias Cigan, Phil Rubio, Monica Windhorst, Rogier A. Jansen, Rolf A. Mathews, Elijah P. |
| contents | We investigate the stellar populations and molecular gas properties of a star-forming region within the dwarf irregular (dIrr) galaxy WLM. Low-metallicity dIrrs like WLM offer a valuable window into star formation in environments that are unlike those of larger, metal-rich galaxies such as the Milky Way. In these conditions, carbon monoxide (CO), typically used to trace molecular clouds, is more easily photodissociated by ultraviolet (UV) radiation, leading to a larger fraction of CO-dark molecular gas, where H$_2$ exists without detectable CO emission, or CO-dark gas in the form of cold HI. Understanding the molecular gas content and the stellar populations in these star-forming regions provides important information about the role of CO-bright and CO-dark gas in forming stars. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_23517 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stellar Populations and Molecular Gas Composition in the Low-Metallicity Environment of WLM Archer, Haylee N. Hunter, Deidre A. Elmegreen, Bruce G. Hunt, Leslie K. O'brien, Rosalia Brinks, Elias Cigan, Phil Rubio, Monica Windhorst, Rogier A. Jansen, Rolf A. Mathews, Elijah P. Astrophysics of Galaxies We investigate the stellar populations and molecular gas properties of a star-forming region within the dwarf irregular (dIrr) galaxy WLM. Low-metallicity dIrrs like WLM offer a valuable window into star formation in environments that are unlike those of larger, metal-rich galaxies such as the Milky Way. In these conditions, carbon monoxide (CO), typically used to trace molecular clouds, is more easily photodissociated by ultraviolet (UV) radiation, leading to a larger fraction of CO-dark molecular gas, where H$_2$ exists without detectable CO emission, or CO-dark gas in the form of cold HI. Understanding the molecular gas content and the stellar populations in these star-forming regions provides important information about the role of CO-bright and CO-dark gas in forming stars. |
| title | Stellar Populations and Molecular Gas Composition in the Low-Metallicity Environment of WLM |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2503.23517 |