NASA's James Webb Space Telescope

ERS Program 1324

Through the Looking GLASS: A JWST Exploration of Galaxy Formation and Evolution from Cosmic Dawn to Present Day

PI: Tommaso Treu (University of California - Los Angeles)
Co-PIs: N/A

Science Category Galaxies and Intergalactic Medium icon
Keywords Chemical Abundances, Emission-Line Galaxies, Galaxy Formation and Evolution, Star-Formation Histories
Investigators Louis Evan Abramson (University of California - Los Angeles)
Marusa Bradac (University of California - Davis)
Gabriel Brammer (Space Telescope Science Institute - ESA)
Adriano Fontana (INAF, Osservatorio Astronomico di Roma)
Alaina L. Henry (Space Telescope Science Institute)
Austin Hoag (University of California - Davis)
Kuang-Han Huang (University of California - Davis)
Charlotte Mason (University of California - Los Angeles)
Takahiro Morishita (Space Telescope Science Institute)
Laura Pentericci (INAF, Osservatorio Astronomico di Roma)
 Xin Wang (University of California - Los Angeles)

We propose a carefully designed set of observations of the lensing  cluster Abell 2744 to study intrinsically faint magnified galaxies from the epoch of reionization to redshift of 1, demonstrating and characterizing complementary spectroscopic modes with NIRSPEC and  NIRISS. The observations are designed to address the questions:

  1. When did reionization happen and what were the sources of reionizing photons?
  2. How do baryons cycle in and out of galaxies?  

This dataset with deep spectroscopy on the cluster and deep multiband NIRCAM imaging in parallel will enable a wealth of investigations and will thus be of interest to a broad section of the astronomical community. The dataset will illustrate the power and challenges of:

  1. Combining rest frame UV and optical NIRSPEC spectroscopy for galaxies at the epoch of reionization;
  2. Obtaining spatially resolved emission line maps with NIRISS; and
  3. Combining NIRISS and NIRSPEC spectroscopy.
Instrument and Mode NIRCam: Parallel imaging
NIRISS: Wide Field Slitless Spectroscopy
NIRSpec: Multi-object Spectroscopy
What does the program enable for the user community?

Building on our extensive experience with HST stlitless spectroscopy and imaging in clusters of galaxies as part of the GLASS, WISP, SURFSUP, and ASTRODEEP projects, we will provide to the community the science-enabling products described below:

  1. Quantitative comparison of spatially resolved (NIRISS) and spectrally resolved (NIRSPEC) spectroscopy;
  2. Object based interactive exploration tools for multi-instrument datasets;
  3. Interface for easy forced extraction of slitless spectra based on coordinates;
  4. UV-optical spectroscopic templates of high redshift galaxies; and
  5. NIRCAM parallel catalogs and a list of 26 z>=9 dropouts for spectroscopic follow-up in Cycle 2.
How will you engage the user community? We are planning 5 community briefings to be held at STSCI and at the AAS, over a period of two years.
Team website URL