Ubiquitous broad line emission and the relation between ionized gas outflows and Lyman continuum escape in Green Pea galaxies

• DOI: 10.48550/arxiv.2401.04278
• Publication Date: 2024-01-01
• Authors: R. Amorín; M. Rodríguez-Henr...; Vital Fernández; J. M. Vı́lchez; R. Marques-Chaves; D. Schaerer; Y. I. Izotov; V. Firpo; N. G. Guseva; Anne Jaskot; Л. Г. Комарова; D. Muñoz-Vergara; M. S. Oey; Omkar Bait; Cody Carr; John Chisholm; Henry C. Ferguson; Sophia R. Flury; Mauro Giavalisco; Matthew Hayes; Alaina Henry; Zhiyuan Ji; William L. King; Floriane Leclercq; Göran Östlin; L. Pentericci; Alberto Saldana-L...; T. X. Thuan; Maxime Trebitsch; Bingjie Wang; G. Worseck; Xinfeng Xu
• Keywords: Line (geometry)

We report observational evidence of highly turbulent ionized gas kinematics in a sample 20 Lyman continuum (LyC) emitters (LCEs) at low redshift ($z\sim 0.3$). Detailed Gaussian modeling optical emission line profiles high-dispersion spectra consistently shows that both bright recombination and collisionally excited lines can be fitted as one or two narrow components with intrinsic velocity dispersion $σ\sim$40-100 km s$^{-1}$, on top broader component $σ\sim$100-300 which contributes up to $\sim$40% the total flux is preferentially blue-shifted from systemic velocity. interpret close young massive star clusters signpost unresolved outflows, resulting stellar winds supernova feedback. find significant correlation between width broad LyC escape fraction, strong LCEs exhibiting more complex than galaxies weaker undetected emission. Our findings provide new supporting predictions models simulations, suggest turbulence outflows radiative mechanical feedback play key role clearing channels through photons galaxies. propose detection nebular compact extreme emission-line indirect diagnostic photon escape, could useful identify potential leakers epoch reionization JWST.