JWST Cycle 1 GTO program
Take a trip back through time with the James Webb Space Telescope. By using massive galaxy clusters as cosmic gravitational lenses, CANUCS enables us to study the evolution of low mass galaxies from 13.5 billion years ago through to the relatively recent 5 billion years ago. Using all three of JWST's near-infrared instruments, the CANUCS dataset provides high-quality imaging and spectroscopy for thousands of galaxies to determine their distances, luminosities, star formation histories, metallicities, dust properties, sizes and morphologies. NIRISS slitless spectroscopy dissects large or strongly-lensed galaxies to determine the spatial distribution of these properties allowing their internal evolution to be determined. NIRCam imaging in a multitude of wide and medium bands enables determining reliable structures, distances and histories for tens of thousands of distant galaxies. NIRSpec prism spectroscopy provides more detailed information on a subset of galaxies, including extreme starburst galaxies and accreting black holes.
JWST Cycle 2 GO program
The “JWST in Technicolor” program, or for short the “Technicolor” program, is a JWST Cycle 2 followup program to CANUCS (PID: 3362, PI: Muzzin). Technicolor observes three of the five CANUCS clusters, specifically the Hubble Frontier Field Clusters (MACS 0416, MACS 1149, Abell 370) with the NIRISS F090W grism in prime and with NIRCam in parallel with 8 broad, medium and narrow-band filters. The deep (~ 9 hour integration) F090W grism observations on the prime CLU field are tuned to detect H-alpha emission at the redshift of the clusters and provide comprehensive spectroscopic redshifts for cluster galaxies. The parallel NIRCam imaging on the NCF fields completes the full suite of NIRCam broad and medium bands from F070W to F480M for up to 29 space-based filters on each field. The extensive medium band imaging allows for the detection of strong line emitters up to z ~ 9, as well as evolved galaxies with Balmer breaks to z ~ 10.
JWST Cycle 3 GO program
The “JWST Ultimate Medium-band Photometric Survey” or “JUMPS” is a JWST Cycle 3 followup program to CANUCS (PID: 5890, PI: Withers). JUMPS obtains deep medium band imaging with NIRCam in the main CLU fields of the three Hubble Frontier Fields clusters in CANUCS (MACS 0416, MACS 1149, Abell 370). Specifically, JUMPS observes in the F360M, F430M, F460M and F480M filters in the LW and is designed to detect the faintest line emitters at z > 6 (M_UV ~ -17) by targeting strong line emission in the medium bands. With the aid of gravitational lensing by the clusters, JUMPS will also unlock ultra-faint line emitters at z > 6 as intrinsically faint as M_UV ~ -12. In the SW band JUMPS obtains an ultra-deep 9 hour integration in the F150W filter. The primary goal of this observation is the identification of z > 15 dropout galaxies aided by the power of gravitational lensing. In parallel to the NIRCam observations, JUMPS obtains F090W, F277W, F356W and F444W imaging in the CANUCS NSF WFSS parallel fields, which aids in the determination of stellar masses and stellar population parameters.
CANUCS will use all three of JWST's near-infrared instruments. The NIRISS low-resolution grisms will provide spectra of thousands of galaxies per field. NIRCam imaging will sample the galaxies structures and SEDs from 0.8 to 5 microns. NIRSpec follow-up low resolution spectroscopy will target galaxies discovered by NIRCam and NIRISS as well as those for which NIRISS does not provide a redshift.
With the power of gravitational lensing we will find and study low-mass galaxies across all epochs. We will search for the earliest galaxies, in rest-frame UV continuum and Lyman alpha line emission.
With low-resolution grism spectroscopy we can isolate nebular line emission and make emission line ratio maps, in order to understand physical properties like SFR, dust, metallicity and ionization.
We will study how galaxies are transformed as they fall into dense galaxy clusters.
