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AGN feedback and ionized gas kinematics in a z~2 galaxy

Federica Loiacono


According to several works active galactic nuclei (AGN) may play an important role in the evolution of galaxies through the ejection of interstellar medium (i. e. outflow) from their inner regions. Gas depletioncan have a strong impact on the star formation activity of a galaxy; in this sense AGN outflows, reducing the gas reservoir of a system, are considered a possible way to suppress star formation in high mass early-type galaxies, which are passively evolving at z~1.
In this context, I will discuss the role of gas expulsion, detected in the [O III] line, in a high mass, z~2 star-forming galaxy which hosts a moderately luminous AGN (not a quasar), in order to assess if it can evolve in a system with quenched star formation.
I will also analyze the kinematics of this galaxy, made feasible through integral field spectroscopy (IFS) data. I used a 3D algorithm to model line emission, in order to take into account the effect of low spatial resolution in IFS data, which can have a strong impact on the derivation of kinematic parameters like rotation velocity and velocity dispersion.

2017 June 01, 15:00

Observatório Astronómico de Lisboa (Seminar room)
Tapada da Ajuda, 1349-018 Lisboa

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia