DESHIMA 2.0: Rapid redshift surveys and multi-line spectroscopy of dusty galaxies

TL;DR

This paper evaluates the feasibility of using the DESHIMA 2.0 superconducting spectrometer for rapid redshift surveys and multi-line spectroscopy of dusty high-redshift galaxies, focusing on detecting key emission lines.

Contribution

It introduces the first performance assessment of the DESHIMA 2.0 chip for high-redshift galaxy observations and outlines its potential for efficient redshift determination and physical diagnostics.

Findings

Performance measurements indicate promising sensitivity for line detection.

Feasibility of detecting [CII] and CO lines in target galaxies is supported.

The approach enables rapid spectroscopic redshift acquisition and galaxy characterization.

Abstract

We present a feasibility study for the high-redshift galaxy part of the Science Verification Campaign with the 220-440 GHz DESHIMA 2.0 integrated superconducting spectrometer on the ASTE telescope. The first version of the DESHIMA 2.0 chip has been recently manufactured and tested in the lab. Based on these realistic performance measurements, we evaluate potential target samples and prospects for detecting the [CII] and CO emission lines. The planned observations comprise two distinct, but complementary objectives: (1) acquiring spectroscopic redshifts for dusty galaxies selected in far-infrared/mm-wave continuum surveys; (2) multi-line observations to infer physical conditions in dusty galaxies.