Preparing for CECILIA: A direct-method metallicity calibration for Cosmic Noon through the Epoch of Reionization

Project: Research project

Project Details


We propose to obtain new MOSFIRE observations of 45 z~2 galaxies in the target field for the CECILIA (Chemical Evolution Constrained using Ionized Lines in Interstellar Aurorae) Survey. CECILIA is a proposed JWST/NIRSpec program that will observe faint, electron temperature-sensitive auroral lines in galaxies spanning a range in gas-phase metallicity (O/H) and lead to the development of more accurate methods of measuring enrichment in high-redshift galaxies. The complementary MOSFIRE program we propose uses a relatively small allocation of Keck time to maximize the scientific return of future JWST observations by optimizing the diversity and detectability of the targeted galaxies. By combining galaxy sizes measured from pre-existing HST imaging with new measurements of the strong rest-optical emission lines in the spectra of the same galaxies, we can predict auroral line surface brightness and select galaxies with a range of properties that remain above our detection threshold.
Effective start/end date1/6/231/11/24


  • California Institute of Technology, Jet Propulsion Laboratory (1689236 // 80NM0018D0004)
  • National Aeronautics and Space Administration (1689236 // 80NM0018D0004)


Explore the research topics touched on by this project. These labels are generated based on the underlying awards/grants. Together they form a unique fingerprint.