Seminario de Astrofísica en el IFIS. El próximo martes 05 de mayo a las 14:30 hrs, el Dr. Vitor Sampaio, investigador postdoctoral de la Universidad Técnica Federico Santa María, presentará en el Instituto de Física el seminario:
“From Local Galaxies to Cosmic Noon: Non-Parametric Morphology Across Cosmic Time”.
La presentación se realizará en la Sala 208 del Instituto de Física (IFIS), 2° piso, Edificio de Ciencias, Campus Curauma, PUCV.
Revisa el abstract de la presentación:
Galaxy morphology is a fundamental probe of galaxy evolution, providing insight into the physical mechanisms that shape galaxies across cosmic time, including mergers, secular processes, star formation, and quenching. A wide range of approaches has been developed to quantify and classify morphology, from visual inspection and citizen-science efforts to parametric modeling, non-parametric structural indexes, and machine/deep learning techniques. Focusing on the use of non-parametric morphological indexes, we test its reliability as a robust and reproducible framework for galaxy classification. The method is first tested in the local Universe, where its performance is assessed through comparison with Galaxy Zoo 1 visual classifications. Once validated at low redshift, the approach is extended to higher redshifts using CANDELS observations, enabling the classification of galaxies over the range 0.2<z<2.4. These classifications provide a basis for studying the cosmological evolution of disk- and bulge-dominated galaxies, revealing how the relative abundance of different structural populations changes with redshift. The analysis also identifies two distinct families of bulge-dominated galaxies, suggesting multiple evolutionary pathways for the formation and assembly of spheroidal systems. Finally, the results motivate future extensions of this framework to even higher redshifts with JWST, where improved depth and spatial resolution will allow galaxy structure to be explored during earlier stages of cosmic history.
Extendemos la invitación a la comunidad PUCV y al público interesado.
