The evolution of the Tully-Fisher relation between z~2.3 and z~0.9 with KMOS^3D

Understand

We investigate the stellar mass and baryonic mass Tully-Fisher relations (TFRs) of massive star-forming disk galaxies at redshift z~2.3 and z~0.9 as part of the KMOS^3D integral field spectroscopy survey.

• Our spatially resolved data allow reliable modelling of individual galaxies, including the effect of pressure support on the inferred gravitational potential.
• At fixed circular velocity, we find higher baryonic masses and similar stellar masses at z~2.3 as compared to z~0.9.
• Together with the decreasing gas-to-stellar mass ratios with decreasing redshift, this implies that the contribution of dark matter to the dynamical mass at the galaxy scale increases towards lower redshift.