CHAMPS

Introduction

To trace the evolution of galaxies through cosmic time, a multi-band survey including sub-mm coverage is crucial. This is especially true since recent small-area blank-field surveys show a considerable number of dust-obscured sources even into the Epoch of Reionization at z > 6. These surveys, however, are targeted and only cover small areas, leading to incompleteness and biases due to source clustering. The "COSMOS High-redshift ALMA-MIRI Population Survey" (CHAMPS) provides the currently largest blank-field survey over 0.18 square-degrees of the COSMOS field in 4800 pointings at 1.2mm (Band 6) and spatial resolution of ~0.8". CHAMPS complements deep, high-resolution JWST/MIRI and NIRCam observations from two JWST Cycle 1 programs with essential sub-mm observations to push our understanding of the dusty early Universe.

The main goals of CHAMPS are to:

(i) measure the amount of dust obscured star formation in galaxies at z = 1 - 6

(ii) characterize the full multi-wavelength SED of 1000s of dust-obscured sources including galaxies and AGN

(iii) measure dust attenuation and interstellar medium masses above and below the star-forming main-sequence by stacking >150,000 near-IR  detected galaxies

(iv) carry out a blind-search of strong CO line emitters at z = 0.4 - 2.7

Observing Strategy

The CHAMPS program covers the joint JWST/MIRI + NIRCam area from the JWST cycle 1 programs COSMOS-Web (PI: Kartaltepe & Casey; Casey et al. 2023) and COSMOS/PRIMER (PI: Dunlop) at 250 GHz (Band 6) in 4800 pointings. The average beam size is 0.5-1.2" over configurations C1-4.

Project Summary

Data Delivery

• A complete and calibrated mosaic of the full 0.18 square-degree CHAMPS area
• A source catalog of CHAMPS-detected sub-mm sources

Team Members

PI: Andreas Faisst; Co-PIs: Manuel Aravena, Caitlin Casey, Jeyhan Kartaltepe, John  Silverman, Sune Toft, Jorge Zavala

Publications

Faisst et al. (in prep)

Martinez et al. (in prep)

Additional Resources

None.