Lunch talk on Jun. 17, 2024

JWST/MIRI imaging in the CEERS and follow-up surveys

Speaker: Guang Yang (Groningen University)

Venue: SWIFAR Building 2111

Time: 12:30 PM, Monday, Jun. 17, 2024

Abstract: 

The MIRI instrument onboard JWST is rapidly changing our understanding of extragalactic astronomy, thanks to its unprecedented sensitivity and angular resolution. The Cosmic Evolution Early Release Science Survey (CEERS) JWST program has a total of 8 MIRI imaging pointings in the EGS field. All of the MIRI observations have been performed, and we have reduced the data. Based on these data, we have performed various scientific investigations about galaxy star formation, stellar mass, mid-IR morphology, and active galactic nuclei (AGN). I will highlight our work on dust-obscured AGN, where we find the MIRI-based black hole accretion density (BHAD) is significantly higher than previous X-ray results by ~0.5 dex at z=3-5. This difference indicates that MIRI is able to identify many heavily obscured AGNs in the early universe. Given the fruitful yields of CEERS, we have successfully applied two more MIRI programs, MEGA and MEOW, which cover an area ~20 times larger than CEERS. We expect exciting scientific results from these upcoming MIRI datasets.

Report PPT:  SWIFAR_Guang Yang.pptx