Supernovae Driven Winds Impede Lyman Continuum Escape from Dwarf Galaxies in First 10 Myr
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2025
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| author | Carr, Cody Cen, Renyue McCandliss, Stephan Ford, Jack Saldana-Lopez, Alberto Scarlata, Claudia Huberty, Mason Jaskot, Anne Flury, Sophia Oey, M. S. Amorín, Ricardo O. Borthakur, Sanchayeeta Hayes, Matthew Heckman, Timothy Ji, Zhiyuan Komarova, Lena Reste, Alexandra Le Leclercq, Floriane Marques-Chaves, Rui Michel-Dansac, Leo Östlin, Göran Ravindranath, Swara Rutkowski, Michael J. Schaerer, Daniel Thuan, Trinh Vanzella, Eros Wang, Bingjie Xu, Xinfeng |
| author_facet | Carr, Cody Cen, Renyue McCandliss, Stephan Ford, Jack Saldana-Lopez, Alberto Scarlata, Claudia Huberty, Mason Jaskot, Anne Flury, Sophia Oey, M. S. Amorín, Ricardo O. Borthakur, Sanchayeeta Hayes, Matthew Heckman, Timothy Ji, Zhiyuan Komarova, Lena Reste, Alexandra Le Leclercq, Floriane Marques-Chaves, Rui Michel-Dansac, Leo Östlin, Göran Ravindranath, Swara Rutkowski, Michael J. Schaerer, Daniel Thuan, Trinh Vanzella, Eros Wang, Bingjie Xu, Xinfeng |
| contents | Observations suggest that UV-bright, compact star-forming galaxies produce enough ionizing (Lyman continuum; LyC) photons to reionize the Universe. Yet, the efficiency of LyC escape and the roles of radiation, stellar winds, and supernovae remain uncertain. Using medium-resolution spectra of six nearly identical local star-forming galaxies, we directly trace, for the first time, the evolution of a multiphase wind through individual spectral lines alongside measurements of the LyC escape fraction. We find that LyC escape peaks early, during a period dominated by intense radiation and stellar winds but lacking a fast galactic wind. As the starbursts age, supernovae drive and accelerate the wind, progressively suppressing LyC escape. These results highlight the need for cosmological simulations to incorporate early feedback as a key driver of reionization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_21197 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Supernovae Driven Winds Impede Lyman Continuum Escape from Dwarf Galaxies in First 10 Myr Carr, Cody Cen, Renyue McCandliss, Stephan Ford, Jack Saldana-Lopez, Alberto Scarlata, Claudia Huberty, Mason Jaskot, Anne Flury, Sophia Oey, M. S. Amorín, Ricardo O. Borthakur, Sanchayeeta Hayes, Matthew Heckman, Timothy Ji, Zhiyuan Komarova, Lena Reste, Alexandra Le Leclercq, Floriane Marques-Chaves, Rui Michel-Dansac, Leo Östlin, Göran Ravindranath, Swara Rutkowski, Michael J. Schaerer, Daniel Thuan, Trinh Vanzella, Eros Wang, Bingjie Xu, Xinfeng Astrophysics of Galaxies Observations suggest that UV-bright, compact star-forming galaxies produce enough ionizing (Lyman continuum; LyC) photons to reionize the Universe. Yet, the efficiency of LyC escape and the roles of radiation, stellar winds, and supernovae remain uncertain. Using medium-resolution spectra of six nearly identical local star-forming galaxies, we directly trace, for the first time, the evolution of a multiphase wind through individual spectral lines alongside measurements of the LyC escape fraction. We find that LyC escape peaks early, during a period dominated by intense radiation and stellar winds but lacking a fast galactic wind. As the starbursts age, supernovae drive and accelerate the wind, progressively suppressing LyC escape. These results highlight the need for cosmological simulations to incorporate early feedback as a key driver of reionization. |
| title | Supernovae Driven Winds Impede Lyman Continuum Escape from Dwarf Galaxies in First 10 Myr |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2510.21197 |