{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/the-low-redshift-lyman-continuum-survey-the","title":"The Low-Redshift Lyman Continuum Survey: The Roles of Stellar Feedback and ISM Geometry in LyC Escape","arxiv_id":"2409.12118","date":"2024-09-18","proceeding":null,"authors":["Sophia R. Flury","Anne E. Jaskot","Alberto Saldana-Lopez","M. S. Oey","John Chisholm","Ricardo Amorín","Omkar Bait","Sanchayeeta Borthakur","Cody Carr","Henry C. Ferguson","Mauro Giavalisco","Matthew Hayes","Timothy Heckman","Alaina Henry","Zhiyuan Ji","Lena Komarova","Floriane Leclercq","Alexandra Le Reste","Stephan McCandliss","Rui Marques-Chaves","Göran Östlin","Laura Pentericci","Swara Ravindranath","Michael Rutkowski","Claudia Scarlata","Daniel Schaerer","Trinh Thuan","Maxime Trebitsch","Eros Vanzella","Anne Verhamme","Bingjie Wang","Gábor Worseck","Xinfeng Xu"],"abstract":"One of the fundamental questions of cosmology is the origin and mechanism(s) responsible for the reionization of the Universe beyond $z\\sim6$. To address this question, many studies over the past decade have focused on local ($z\\sim0.3$) galaxies which leak ionizing radiation (Lyman continuum or LyC). However, line-of-sight effects and data quality have prohibited deeper insight into the nature of LyC escape. To circumvent these limitations, we analyze stacks of a consolidated sample of {\\it HST}/COS observations of the LyC in 89 galaxies at $z\\sim0.3$. From fitting of the continuum, we obtain information about the underlying stellar populations and neutral ISM geometry. We find that most LyC non-detections are not leaking appreciable LyC ($f_{esc}^{\\rm LyC}<1$\\%) but also that exceptional cases point to spatial variations in the LyC escape fraction $f_{esc}^{\\rm LyC}$. Stellar populations younger than 3 Myr lead to an increase in ionizing feedback, which in turn increases the isotropy of LyC escape. Moreover, mechanical feedback from supernovae in 8-10 Myr stellar populations is important for anisotropic gas distributions needed for LyC escape. While mechanical feedback is necessary for any LyC escape, high $f_{esc}^{\\rm LyC}$ ($>5$\\%) also requires a confluence of young stars and ionizing feedback. A two-stage burst of star formation could facilitate this optimal LyC escape scenario.","url_abs":"https://arxiv.org/abs/2409.12118v1","url_pdf":"https://arxiv.org/pdf/2409.12118v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"the-low-redshift-lyman-continuum-survey-the","repo_url":"https://github.com/sflury/KaplanMeier","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}