CHAMPS: The COSMOS High-Redshift ALMA-MIRI Population Survey - A New Census of the Dusty Early Universe

@misc{faisst2026champs,
  title = {{CHAMPS: The COSMOS High-Redshift ALMA-MIRI Population Survey - A New Census of the Dusty Early Universe}},
  author = {Andreas L. Faisst and Felix Martinez III and Jeyhan S. Kartaltepe and Manuel Aravena and Caitlin M. Casey and John D. Silverman and Sune Toft and Ezequiel Treister and Jorge A. Zavala and Hiddo S. B. Algera and Andrew J. Battisti and Michele Catone and Jaclyn B. Champagne and Yingjie Cheng and Rasha M. Samir and Maximilien Franco and Kyle Finner and Carter Flayhart and Fabrizio Gentile and Ghassem Gozaliasl and Santosh Harish and Shuowen Jin and Yu-Heng Lin and Lun-Jun Liu and Arianna S. Long and Crystal L. Martin and Bahram Mobasher and Francesca Pozzi and Huimin Qu and Chuan Tian and Mattia Vaccari and Wuji Wang and Can Xu and Hollis B. Akins and Micaela B. Bagley and Angela Bongiorno and Kevin C. Cooke and Olivia R. Cooper and Simon Hempel-Costello and Ivan Delvecchio and Nicole E. Drakos and Andrea Enia and Steven L. Finkelstein and Seiji Fujimoto and Steven Gillman and Carlos Gomez-Guijarro and Jorge Gonzalez-Lopez and Michaela Hirschmann and Olivier Ilbert and Kei Ito and Knud Jahnke and Boris S. Kalita and Daichi Kashino and Vasily Kokorev and Thomas S. -Y. Lai and Erini Lambrides and Daizhong Liu and Georgios E. Magdis and Vincenzo Mainieri and Sinclaire M. Manning},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.35992},
  eprint = {2609.35992},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.35992},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - CHAMPS: The COSMOS High-Redshift ALMA-MIRI Population Survey - A New Census of the Dusty Early Universe
AU  - Andreas L. Faisst
AU  - Felix Martinez III
AU  - Jeyhan S. Kartaltepe
AU  - Manuel Aravena
AU  - Caitlin M. Casey
AU  - John D. Silverman
AU  - Sune Toft
AU  - Ezequiel Treister
AU  - Jorge A. Zavala
AU  - Hiddo S. B. Algera
AU  - Andrew J. Battisti
AU  - Michele Catone
AU  - Jaclyn B. Champagne
AU  - Yingjie Cheng
AU  - Rasha M. Samir
AU  - Maximilien Franco
AU  - Kyle Finner
AU  - Carter Flayhart
AU  - Fabrizio Gentile
AU  - Ghassem Gozaliasl
AU  - Santosh Harish
AU  - Shuowen Jin
AU  - Yu-Heng Lin
AU  - Lun-Jun Liu
AU  - Arianna S. Long
AU  - Crystal L. Martin
AU  - Bahram Mobasher
AU  - Francesca Pozzi
AU  - Huimin Qu
AU  - Chuan Tian
AU  - Mattia Vaccari
AU  - Wuji Wang
AU  - Can Xu
AU  - Hollis B. Akins
AU  - Micaela B. Bagley
AU  - Angela Bongiorno
AU  - Kevin C. Cooke
AU  - Olivia R. Cooper
AU  - Simon Hempel-Costello
AU  - Ivan Delvecchio
AU  - Nicole E. Drakos
AU  - Andrea Enia
AU  - Steven L. Finkelstein
AU  - Seiji Fujimoto
AU  - Steven Gillman
AU  - Carlos Gomez-Guijarro
AU  - Jorge Gonzalez-Lopez
AU  - Michaela Hirschmann
AU  - Olivier Ilbert
AU  - Kei Ito
AU  - Knud Jahnke
AU  - Boris S. Kalita
AU  - Daichi Kashino
AU  - Vasily Kokorev
AU  - Thomas S. -Y. Lai
AU  - Erini Lambrides
AU  - Daizhong Liu
AU  - Georgios E. Magdis
AU  - Vincenzo Mainieri
AU  - Sinclaire M. Manning
PY  - 2026
DA  - 2026/09/28
PB  - arXiv
DO  - 10.48550/arxiv.2609.35992
UR  - https://arxiv.org/abs/2609.35992
AB  - Understanding how dust forms and evolves over cosmic time is a key open problem in extragalactic astrophysics. Galaxies in the early Universe were once thought to be mostly dust-poor, but recent discoveries of heavily dust-obscured galaxies near the Epoch of Reionization challenge models of early dust production and raise new questions about the true cosmic star formation rate density. In this paper, we present the COSMOS High-Redshift ALMA-MIRI Population Survey (CHAMPS), which sheds light on the dusty early universe at z>4. CHAMPS is a new 144h ALMA 1.2mm (band 6) large program mapping the combined JWST/NIRCam+MIRI footprint in the COSMOS field. It covers 0.2deg2 with a synthesized beam size of 1.1" and a sensitivity of 0.14mJy/beam. It is complemented, alongside JWST, by ancillary X-ray, UV, optical, sub-mm, and radio data. CHAMPS, optimized as a blind survey, detects above 5σ approximately 385 individual dusty high-redshift sub-mm sources, 68 dusty AGN, and a dozen dusty galaxies at z>6. The galaxies are largely not detected in JWST/F150W, making them prototypical near-IR dark galaxies. We showcase three of the highest-redshift most dusty and massive candidate galaxies detected in CHAMPS with redshifts up to z=7.5. CHAMPS also enables stacks of thousands of galaxies grouped in bins of various physical parameters. Its sub-mm coverage of dust-attenuated JWST-identified galaxies provides robust constraints on dust masses and obscured star formation rates to study early dust formation and evolution. In addition, CHAMPS enables a blind search for luminous CO line emitters at z=0.4-2.7 and [CII]158μm emitters at z=6.7.
ER  -