Viernes 04/11: Probing the high-redshift universe through detailed studies of extreme emission-line galaxies

Expositor: Dr. Ricardo Amorín (Departamento de Física y Astronomía – Universidad de La Serena, Chile)

Fecha: viernes 4 de noviembre, 11 hs.

Resumen: UV-luminous galaxies with extreme emission-line properties, such as the “Green Pea” (GPs) galaxies, are excellent low-redshift analogs of primeval galaxies driving reionization at redshift z>6. They provide a unique laboratory to study compact starbursts in low-metallicity environments and understand how feedback shapes the ISM conditions that are common at the early stages of galaxy evolution. Besides, the direct detection of Lyman continuum emission in GPs with HST has opened a new avenue to learn about the main physical processes governing the escape of ionizing photons from galaxies, thus providing unique insight to understand cosmic re-ionization. In this talk, I will present results from recent observational studies on extreme emission-line galaxies that are aimed at resolving the complex interplay between massive bursts of star formation and feedback, the ISM physical properties (ionization, chemical abundances), and the escape of ionizing radiation using optical and UV imaging and high-resolution spectroscopy. Lessons learned from these low-z analogs will be discussed while presenting some of the first results of early release science (ERS) programs of JWST aimed at providing similar analyses on high-z galaxies.

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