Seminario de Astrofísica en el IFIS. Este martes 17 de noviembre a las 14:30 hrs, el Dr. Diego Pallero, investigador adjunto de la Universidad Técnica Federico Santa María, presentará en el Instituto de Física el seminario:
“Characterising the formation of S0-galaxies (CaFES-0): Upcoming science with SPLUS and CHANCES-4MOST”.
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:
One of the fundamental problems in modern astrophysics is understanding the environment’s role in the galaxy’s evolution. Many works, both theoretical and observational, have focused on this topic. Nevertheless, it remains unclear which physical mechanisms primarily drive the quenching of star formation. We used state-of-the-art hydrodynamical simulations to characterise when galaxies quench their star formation and undergo morphological transformations. We find that > 70% of galaxies suffer strong drops in their SFR before they are accreted onto the clusters, regardless of the cluster mass. However, most galaxies get completely quenched once they fall into galaxy clusters, several Gyr after this processing event. Ram-pressure stripping, occurring at the outskirts of the first cluster in which galaxies reside, is the primary culprit behind this quenching. Additionally, when looking specifically at the population of S0 galaxies, we found that lenticular galaxies can be split into two distinctive populations: first, a dominant population of satellite galaxies inhabiting massive haloes with no mergers at z<2, and second, a population of central lenticular galaxies inhabiting less massive haloes with a mixed merging history. This work suggests that S0s, and quenched galaxies in general, are formed primarily via ram-pressure stripping, with properties such as their stellar mass and sizes reflecting their formation history. These results will be tested with current and upcoming multi-wavelength observations from surveys such as S-PLUS, CHANCES/4MOST, LOFAR, and Euclid, providing key insights into what to look for when trying to understand the origin of lenticular galaxies.
Extendemos la invitación a la comunidad PUCV y al público interesado.
