The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies

• DOI: 10.3847/1538-4357/adb72f
• Publication Date: 2025-03-25T09:29:02Z
• Authors: Cody A. Carr; Renyue Cen; Claudia Scarlata; Xinfeng Xu; Alaina Henry; Rui Marques-Chaves; Daniel Schaerer; Ricardo O. Amorín; M. S. Oey; Lena Komarova; Sophia Flury; Anne Jaskot; Alberto Saldana-L...; Zhiyuan Ji; Mason Huberty; Timothy Heckman; Göran Östlin; Omkar Bait; Matthew James Hayes; Trinh Thuan; Swara Ravindranath; Danielle A. Berg; Mauro Giavalisco; Michael Rutkowski; Sanchayeeta Borth...; John Chisholm; Harry C. Ferguson; Leo Michel-Dansac; Anne Verhamme; Gábor Worseck
• Keywords: Star (game theory); Local Group

Abstract Feedback is widely recognized as an essential condition for Lyman continuum (LyC) escape in star-forming galaxies. However, the mechanisms by which galactic outflows clear neutral gas and dust remain unclear. In this paper, we model Mg ii 2796 Å, 2804 Å absorption emission lines 29 galaxies taken from Low- z LyC Survey to investigate impact of (radiation mechanical) feedback on escape. Using constraints + photoionization models, map outflows’ hydrogen content predict <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> mathvariant="normal">LyC</mml:mi> </mml:msubsup> </mml:math> with a multiphase wind model. We measure mass-, momentum, energy loading factors winds, carry up 10% momentum 1% star formation rate (SFR)-based deposition rates. use spectral distribution template fitting determine relative ages stellar populations, allowing us identify radiation dominant systems. then examine related properties (stellar age, factors, etc.) under conditions that optimize efficiency, specifically high-SFR surface density compactness. Our findings indicate strongest leakers are dominant, lack deep features, but have extended broad components higher-ionization like [O iii ] 5007 observed Amorín et al. contrast, experiencing supernovae typically exhibit weaker show evidence both lines. attribute these enhanced facilitated turbulence cloud fragmentation intense fields, prolonged low-metallicity environments delayed supernova feedback.