Submillimeter Instrumentation & ISM Studies of Galaxies in the Early Universe with Far-IR Fine-Structure Emission Lines

Date: 
Tuesday, November 22, 2016 - 3:30pm PST
Speaker: 
Amit Vishwas
Affiliation: 
Cornell University
Location: 
N232, room 103
Event Type: 
Seminar

Understanding the interstellar medium (ISM) of galaxies is paramount for developing insights to the formation of galaxies in the Universe. Studies of the ISM in high redshift galaxies have progressed tremendously in the past years, but studies of the physical properties based on a suite of fine structure lines are still in their beginning stages. I will briefly describe our instrument, the 2nd generation High Redshift (z) and Early Universe Spectrometer (ZEUS-2) which along with ZEUS-1 has enabled pioneering studies of the fine structure lines of C, N, and O at high-z. We are tracing the star-formation activity, witnessing the build up of first metals and studying feedback mechanisms to address the initial stages of galaxy evolution between z~1-5. We have recently started a survey of [OIII]/[NII] with ZEUS-2 at the Atacama Pathfinder Experiment telescope in northern Chile. I will present initial results from our observations that reveal physical conditions of the ISM, young starbursts and rapid gas depletion timescales in some of the brightest galaxies in the early Universe and highlight synergies with current facilities and future instruments aboard SOFIA and JWST.

 

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