RESEARCH
Our team studies the formation and evolution of galaxies at epochs when the Universe was only a fraction of its present age and we do so using the most powerful telescopes in space (JWST, HST, Spitzer, Euclid) and on the ground (Subaru, CFHT, and Gemini).
KEY PROJECTS
‣ JWST CANUCS:
‣ DEEP wide-area imaging: DEUS and CLAUDS
DEUS builds on CFHT Large Area U-band Deep Survey (CLAUDS), which is a very deep U-band imaging survey that overlaps with the Subaru Hyper Suprime-Cam (HSC) survey Deep/UltraDeep fields. The CLAUDS data (68 dedicated CFHT dark-time nights plus archival data) are all in hand, as are the Subaru observations. We are using these joint catalogs for a large range of scientific applications, from detailed galaxy evolutions studies over 0<z<1, to assembling large samples of galaxies, quasars and proto-clusters at z~2-3. We are working on many of these topics, and have published over 20 papers on them already, with many more in preparation.
‣ GIRMOS:
GIRMOS (Gemini InfraRed Multi-Object Spectrograph) is a next-generation instrument that we are building for the Gemini-North 8-metre telescope in Hawai`i. When it is deployed in 2027, GIRMOS will have the ability to take spatially-resolved spectra of four targets at once with light fed to it by Gemini’s new state-of-the-art GNAO adaptive optics system now also under construction as the largest component of Gemini’s GEMMA program. GIRMOS will target high-redshift (1 < z < 10) galaxies in order to study their formation and evolution, back to a time when galaxies were first forming and through to Cosmic Noon. GIRMOS will also study star-formation physics within the Milky Way Galaxy and do near-field cosmology through the study of metal-poor stars in the Milky Way’s central bulge. I am leading the team that’s developing the GIRMOS data reduction software and we look forward to using GIRMOS when it goes on the sky in 2027!
SELECTED RECENT PUBLICATIONS
•ΛCDM not dead yet (Desprez, Martis, Asada, Sawicki, et al. 2023)
•Bursty star formation and galaxy-galaxy interactions 1 Gyr after the Big Bang (Asada, Sawicki, et al. 2023b)
•JWST catches the assembly of a z~5 ultra-low-mass galaxy (Asada, Sawicki, et al. 2023a)
•First large catalogue of spectroscopic redshifts in JWST’s First Deep Field (Noirot, Desprez, Asada, Sawicki et al. 2023)
•CLAUDS catalogs (Desprez et al. 2023)
•Across the green valley with HST grisms (Noirot, Sawicki, et al. 2022)
•Ionizing radiation from z>3 AGN (Iwata, Sawicki, et al. 2021)
•Star/galaxy classification with XGboost (Golob, Sawicki, et al. 2021)
•UV luminosity functions since z~3 with 4 million galaxies in CLAUDS+HSC (Moutard, Sawicki, et al. 2020)
•The CLAUDS project (Sawicki et al. 2019)
➡ See here for my full publication list: Google Scholar and SAO/NASA ADS