Loading Events

« All Events

  • This event has passed.

EA: Chemical evolution of galaxies- Tissera

April 22 @ 9:00 am 9:45 am CMT

The evolution of chemical abundances in galaxies provides crucial information to study how they formed and evolved.

Results in the Local Universe show that on average, star-forming gas-phase in galaxies  have negative metallicity gradients and that flat and inverted positive gradients could be associated with galaxy interactions. As a function of redshift, the trend is not clear enough yet, although there is a significant fraction of inverted metallicity gradients.

In series of papers using the EAGLE simulations, we studied the metallicity gradients at z=0 and the processes that might affect them and the azimuthal metallicity distribution such as mergers, SN and AGN feedback and gas inflows. We extended the analysis as a function of redshift, focusing on the impact of mergers in triggering strong positive or negative gradientes. We found galaxies with negative metallicity gradients more frequent in disc-dominated galaxies, which also determine a relation with size. Galaxies with positive gradients departure from this relation and show  systematic differences to be associated with recent mergers or starbursts.

In this talk, I am going to summarize the latest results from the EAGLE project, on the evolution of the metallicity gradients as a function of stellar mass, galaxy size and star formation efficiency up to z~2.5 and  on the impact of the environment by analyzing  the metallicity gradients of galaxies in voids and filaments.


Animated Social Media Icons by Acurax Responsive Web Designing Company
Visit Us On YoutubeVisit Us On Twitter