The role of supernova feedback on the origin of the stellar and baryonic Tully-Fisher relations

TL;DR

This study uses hydrodynamical simulations to explore how supernova feedback influences the stellar and baryonic Tully-Fisher relations, revealing its role in shaping these relations and their evolution over cosmic time.

Contribution

The paper demonstrates, through simulations, that supernova feedback causes a steepening of the stellar Tully-Fisher relation at low masses and predicts a linear baryonic relation at z~0.

Findings

Supernova feedback causes a steepening of the stellar Tully-Fisher relation at low masses.

The baryonic Tully-Fisher relation remains linear at z~0.

Feedback efficiency varies with galaxy mass, affecting star formation regulation.

Abstract

In this work, we studied the stellar and baryonic Tully-Fisher relations by using hydrodynamical simulations in a cosmological framework. We found that supernova feedback plays an important role on shaping the stellar Tully-Fisher relation causing a steepening of its slope at the low-mass end, consistently with observations. The bend of the relation occurs at a characteristic velocity of approximately 100 km/s, in concordance with previous observational and theoretical findings. With respect to the baryonic Tully-Fisher relation, the model predicts a linear trend at z~0 with a weaker tendency for a bend at higher redshifts. In our simulations, this behaviour is a consequence of the more efficient action of supernova feedback at regulating the star formation process in smaller galaxies.