1. Brian Welch et al. (arXiv:2208.09007, ApJ 940 1) JWST Imaging of Earendel, the Extremely Magnified Star at Redshift z = 6.2
  2. Larry Bradley et al. (arXiv:2210.01777, ApJ accepted) High-Redshift Galaxy Candidates at z = 9 − 10 as Revealed by JWST Observations of WHL0137-08
  3. Tiger Hsiao et al. (arXiv:2210.14123, ApJ 949 34) JWST reveals a possible z∼11 galaxy merger in triply-lensed MACS0647−JD
  4. Eros Vanzella et al. (arXiv:2211.09839, ApJ 944 53) JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc
  5. Ashish Kumar Meena et al. (arXiv:2211.13334, ApJL 944 6) Two lensed star candidates at z≃4.8 behind the galaxy cluster MACS J0647.7+7015
  6. Abdurro'uf et al. (arXiv:2301.02209, ApJ 945 117) Spatially Resolved Stellar Populations of 0.3<z<6.0 Galaxies in WHL0137-08 and MACS0647+70 Clusters as Revealed by JWST: How do Galaxies Grow and Quench Over Cosmic Time?
  7. Tiger Hsiao et al. (arXiv:2305.03042) JWST NIRSpec spectroscopy of the triply-lensed z=10.17 galaxy MACS0647−JD
  8. Lukas Furtak et al. (arXiv:2308.00042) Reaching for the stars -- JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76
  9. Anton Vikaeus et al. (arXiv:2309.02504) To be, or not to be: Balmer breaks in high-z galaxies with JWST
  10. Meghana Killi et al. (arXiv:2312.03065) Deciphering the JWST spectrum of a 'little red dot' at z∼4.53: An obscured AGN and its star-forming host
  11. Angela Adamo et al. (arXiv:2401.03224) The discovery of bound star clusters 460 Myr after the Big Bang


JWST observations of gravitational lensing by galaxy clusters

Our team is leading JWST programs in Cycles 1 and 2: 1433, 2282, 4412, 4246. (Other JWST programs observing lensing clusters include the ERO, GLASS, TEMPLATES, UNCOVER, CANUCS, PEARLS, MAGNIF, and GLIMPSE )

Sunrise Arc + Earendel

The most highly magnified galaxy observed in the first billion years, revealing parsec-scale star clusters and the individual star system Earendel.

Cosmic Gems Arc

The most highly magnified galaxy observed in the first 500 million years, also revealing parsec-scale star clusters, including some that likely persisted for over 13 billion years to remain as globular clusters in a modern-day galaxy.


One of the most distant galaxies ever seen by Hubble (z = 10.17, observed 460 Myr after the Big Bang) and the brightest (AB mag 25) known at this distance. JWST revealed it to have two components as well as a companion galaxy, all likely destined to merge.