20.500.12556/RUL-181938 A Lyman continuum analysis of $\sim 100$ galaxies at $z_{\mathrm{spec}}\sim 3$ in the Abell 2744 cluster field Identifying Lyman continuum (LyC) leakers at intermediate redshifts is crucial for understanding the properties of cosmic reionizers because the opacity of the intergalactic medium (IGM) prevents the direct detection of LyC emission from sources during the Epoch of Reionization (EoR). In this study, we confirm two new LyC candidate leakers at ▫$z \sim 3$▫ in the Abell 2744 cluster field, with absolute escape fractions ▫$(f_{\text{esc}})$▫ of ▫$0.83_{-0.80}^{+0.15}$▫ and ▫$0.74_{-0.70}^{+0.23}$▫, respectively. The LyC emission was detected using HST/WFC3/F275W and F336W imaging. These two candidate leakers appear to be faint (▫$M_{\text{UV}} = -17.61 \pm 0.06$▫ and ▫$-18.22 \pm 0.10$▫), exhibit blue UV continuum slopes (▫$\beta = - 2.43 \pm 0.05$▫ and ▫$-1.92 \pm 0.09$▫), have low masses (▫$M_{\ast} \sim 10^{7.51 \pm 0.03}$▫ and ▫$10^{7.17 \pm 0.15}\ M_{\ast}$▫) and Ly▫$\alpha$▫ equivalent widths of ▫$90 \pm 3$▫ Å and ▫$28 \pm 12$▫ Å, respectively. These two LyC candidate leakers were detected in a catalog of 91 spectroscopically confirmed sources using public spectra from the JWST and/or MUSE. We also analyzed properties that were proposed as indirect indicators of LyC emission, such as Ly▫$\alpha$▫, the O32 ratio, and ▫$M_{\ast}$▫. We created a galaxy subsample that was selected according to these properties, stacked the LyC observations of this subsample, and assessed the limits of the escape fractions in the stacks. We aim to enhance our understanding of LyC escape mechanisms and improve our predictions of the LyC ▫$f_{\text{esc}}$▫ during the EoR by analyzing the individual candidates and the stacks in the context of the currently limited sample of known LyC leakers at ▫$z \sim 3$▫. galaxy evolution high-redshift galaxies star formation galaksije rdeči premik nastanek zvezd nastanek galaksij true false true Angleški jezik Slovenski jezik Članek v reviji 2026-04-20 12:52:19 2026-04-20 12:52:21 2026-04-22 15:08:38 0000-00-00 00:00:00 2025 0 0 12 str. art. no. A328 Vol. 704 Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 524.8 1432-0746 10.1051/0004-6361/202556410 275775747 https://www.aanda.org/articles/aa/full_html/2025/12/aa56410-25/aa56410-25.html 1 c895407a-3ca6-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=232745 aa56410-25.pdf aa56410-25.pdf 1 3E6061F3C4BFB521B3333EA4913C241A 90544dd46a10ca0ae325a2794daf787f159a60f398d9c3e4f17cd1533390835b 046585f9-3ca7-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=232746 Fakulteta za matematiko in fiziko 0 0 0