Speaker
Description
Relic galaxies are massive, compact, quiescent objects observed in the local Universe that have not experienced any significant interaction episodes or merger events since about z = 2, remaining unaltered since their formation. These galaxies with frozen history can provide important clues about the intrinsic processes related to the formation and evolution of massive Early-Type Galaxies (ETGs). Using the high-resolution cosmological simulation Illustris TNG-50, we investigate the assembly history of a sample of massive, compact, old, and quiescent subhalos in distinct cosmic times at z = 2, z = 1.5, and z = 0. We divide this sample into two groups: those which present less than 10% of satellite accretion were called Relic analogs and the remaining ones were called ETGs. Here we are focusing on the similarities and differences between the local dynamics and global environmental features at z = 0. We use two numerical approaches to investigate the assembly history of our sample: kinematic effects on subhalos based on the separation of stellar constituents into different morphological components and the global environmental framework. Our preliminary results indicate that ETGs and Relic galaxies' evolutionary pathways are similar and steady, considering the range of parameters explored in all the redshifts adopted.
