The process by which massive galaxies transition from blue , star-forming disks into red , quiescent galaxies remains one of the most poorly-understood aspects of galaxy evolution .
In this investigation , we attempt to gain a better understanding of how star formation is quenched by focusing on a massive post-starburst galaxy at z = 0.747 .
The target has a high stellar mass and a molecular gas fraction of 30 % — unusually high for its low star formation rate .
We look for indicators of star formation suppression mechanisms in the stellar kinematics and age distribution of the galaxy obtained from spatially resolved Gemini Integral-Field spectra and in the gas kinematics obtained from ALMA .
We find evidence of significant rotation in the stars , but we do not detect a stellar age gradient within 5 kpc .
The molecular gas is aligned with the stellar component , and we see no evidence of strong gas outflows .
Our target may represent the product of a merger-induced starburst or of morphological quenching ; however , our results are not completely consistent with any of the prominent quenching models .