Relation of extremely UV-bright star-forming galaxies at z ∼ 2.4–3.6 to high-redshift populations and RUBIES-UDS-QG-z7

Establish whether and how extremely UV-bright star-forming galaxies at redshifts z ≈ 2.4–3.6 are related to the massive quiescent galaxy RUBIES-UDS-QG-z7 at z = 7.29 and to other high-redshift galaxy populations, and characterize the nature of any evolutionary connection.

Background

Very UV-luminous star-forming galaxies have been found at z ∼ 2.4–3.6, indicating that such extreme systems exist at later times. However, their connection to the high-redshift populations discussed in the paper—and specifically to potential progenitors or analogs of RUBIES-UDS-QG-z7—is not established. Determining any evolutionary linkage would inform models of rapid mass assembly and quenching.

References

Purely star-forming galaxies reaching very bright UV magnitudes (M UV ∼ −23 to −24.7) have recently been found at z ∼ 2.4−3.6 (Marques-Chaves et al. 2020, 2022), showing that such objects exist at later times. If and how they are related to RUBIES-UDS-QG-z7 and other high-redshift populations, remains to be established.

— RUBIES Reveals a Massive Quiescent Galaxy at z=7.3 (2409.03829 - Weibel et al., 5 Sep 2024) in Section 5.3