James Webb Space Telescope Feed Post

Date: 5/14/2024

Arxiv: JWST's PEARLS: resolved study of the stellar and dust components in starburst galaxies at cosmic noon Published: 5/13/2024 8:58:24 PM Updated: 5/13/2024 8:58:24 PM

Paper abstract: Dusty star-forming galaxies (DSFGs) contribute significantly to the stellarbuildup at cosmic noon. Major mergers and gas accretion are often invoked toexplain DSFGs' prodigious star-formation rates (SFRs) and large stellar masses.We conducted a spatially-resolved morphological analysis of the rest-frameUV/NIR emission in three DSFGs at z~2.5. Initially discovered as CO emitters byNOEMA observations of a bright Herschel source, we observed them with theJWST/NIRCam as part of the PEARLS program. The NIRCam data reveal the galaxies'stellar population and dust distribution on scales of 250 pc. Spatialvariations in stellar mass, SFR, and dust extinction are determined in resolvedmaps obtained through pixel-based SED fitting. The CO emitters are massive,dusty starburst galaxies with SFRs ranging from 340 to 2500 Msun/yr,positioning them among the most active SFGs at 2