Fraternali

How the CGM falls into galaxies
The continuous accretion of gas is fundamental to sustaining star formation in galaxies, yet this process remains largely hidden from direct observation due to its elusive nature. I will explore two primary methods for detecting gas accretion: examining low-column density gas out in the circumgalactic medium (CGM) far away from galaxies, and analyzing the extraplanar gas at the disc-halo interface. A critical focus will be on the gas kinematics as the key observable to understand the directionality and properties of the gas flows. By comparing the kinematic of gas clouds from extensive datasets with dynamic models, we can gain insights into the mechanisms of gas accretion. This approach not only sheds light on the accretion process but can also allow us to quantify its properties, including the rate of accretion, its localisation and its angular momentum.

How the CGM falls into galaxies

The continuous accretion of gas is fundamental to sustaining star formation in galaxies, yet this process remains largely hidden from direct observation due to its elusive nature. I will explore two primary methods for detecting gas accretion: examining low-column density gas out in the circumgalactic medium (CGM) far away from galaxies, and analyzing the extraplanar gas at the disc-halo interface. A critical focus will be on the gas kinematics as the key observable to understand the directionality and properties of the gas flows. By comparing the kinematic of gas clouds from extensive datasets with dynamic models, we can gain insights into the mechanisms of gas accretion. This approach not only sheds light on the accretion process but can also allow us to quantify its properties, including the rate of accretion, its localisation and its angular momentum.

ESO — Reaching New Heights in Astronomy

Fraternali

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