Daftar Isi: Cold gas kinematics of star forming galaxies at high-z cluster forming epoch

Daftar Isi:

I present recent results of ALMA observations toward protocluster z=2.49. With the observations of 1.1 mm dust continuum, CO(3-2) at 0".7-0".9 resolution allowed us to derive global ISM mass for the massive-end (>4.e10 Msun) of the star forming galaxies on the main sequence. We find a tentative, intriguing trend of changing SFE with respect to the increasing stellar mass that increases at higher rate than what is expected from (or opposed to) the results in field galaxies, which also correlates with the local density. Higher resolution imaging with CO(4-3) down to 0".3 gives some hints on this trend. With similarly higher resolution (~0".2) in 2 mm dust detection, we study the cold gas kinematics of galaxies. Our results suggest that major mergers play a crucial role for the evolution of the massive galaxies during the cluster forming epoch in the protocluster. 'Talk presented at the conference Galaxy evoltion Across Time, 12-16 June, Paris, France'