NIRCam
NIRCam imaging
Science:
- z=11: spatial resolution, faint extent, age, dust, stellar mass
- z ~ 6 – 8 candidates
- z > 10 lensed LFs (publicly available data)
New baseline plan is ~1 hour per band in each of:
F090W, F115W, F150W, F200W, F277W, F356W, F410M, F444W
AB mag ~29 (5-sigma) ~Frontier Fields depth
200 Myr SED with simulated NIRCam + MIRI photometry:
https://jwst-docs.stsci.edu/display/JTI/NIRCam+Imaging+Sensitivity
SW photometric aperture r = 0.04" (2.5 pixels); background annulus 0.6" – 0.99"
LW photometric aperture r = 0.08" (2.5 pixels); background annulus 0.6" – 0.99" background annulus 1.2" – 1.95"
MIRI photometric aperture r = 0.3" (2.7 pixels); background annulus 0.6" – 0.99"
Spatial resolution and depth! Single building block r < 100 pc? Or will we reveal additional fainter features as in the MS1358 z=4.92 arc? Is our proposed depth sufficient?
Zitrin+11 reconstruction:
Previously considered plan:
The z = 11 lensed images will fit within one NIRCam module (2.2’x2.2') and one NIRSpec MSA quadrant (1.5’x1.5’). But we need NIRCam imaging over a wider area (~5’x5’) to provide targets for the 3 remaining MSA quadrants. See attached screenshot from APT. With such wide imaging, the z = 11 galaxy would receive only half the total exposure time. It’s a somewhat costly but necessary fishing expedition.
We could additionally obtain deeper NIRCam imaging concentrated on the z = 11 galaxy images (darker blue in the screenshot). If we did this as a separate observation, we could add value by using different filters. For example:
deep: F115W, F150W, F200W, F277W, F356W, F444W
wide: F070W, F090W, F150W2, F322W2, F410M, F460M
