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S20A0075abst

S20A0075

This is a re-submission of our S18A Keck time-exchange program which was 75% lost by weather. We want to complete it with 1.5 night allocation. Galaxy formation is regulated by gas feeding (inflow), consumption (star formation), and feedback (outflow). However, these gaseous processes and their environmental dependence are yet among the largest misteries in modern extragalactic astronomy. We propose to conduct deep NIR spectroscopy with MOSFIRE on our narrow-band selected star-forming galaxies in two proto-clusters at z=1.5 and 2.5 where we have CO(2–1) or CO(3–2) line detections and/or dust continuum detections with ALMA. By combining the gaseous metallicities measured with NIR spectroscopy, together with the molecular gas mass fractions already available directly from the submm-radio data, we will apply the first full analysis of chemical evolution of individual galaxies on the metallicity vs. gas mass fraction diagram together with sSFR info in high density environments at the cosmic noon. We will be able to put new constraints on the gas transfer processes between galaxies and the surrounding regions from which we can address the environmental effects acting on these processes for the first time in the forming progenitors of present-day cluster early-type galaxies.

This document was translated from LATEX by HEVEA.