Lunch talk on Jun. 20, 2022

Searching for High-z Dusty Star-Forming Galaxies with NIKA2 and NOEMA

Speaker: Longji Bing (Laboratoire d'Astrophysique de Marseille)

Venue: Video Conference

Time: 12:30 PM, Monday, Jun. 20, 2022

Abstract: 

As the possible progenitors of passive galaxies at z=2-3, dusty star-forming galaxies(DSFGs) at z>4 provide a unique perspective to study the formation, assembly and early quenching of massive galaxies in the early Universe. In this talk, I will present the status, data analysis and results on millimeter number counts from NIKA2 Cosmological Legacy Survey (N2CLS), a GTO large program of IRAM 30m telescope focusing on the census of high-z DSFGs in GOODS-N and COSMOS. Besides, we will also introduce a joint-analysis method to efficiently search for the most possible spectroscopic redshift in spectral scan observations of high-z DSFGs candidates. This framework use the total IR luminosities estimated by the SED fitting to predict the line fluxes and evaluate if the (non)detections are consistent with the expected line fluxes at given redshifts. We will show its power in identifying the redshift of high-z DSFGs found in NIKA2 science verification data, and discuss the possible implications of this framework for the N2CLS survey.