Study of a lensed sub-millimeter galaxy identified by ALMA at z~3 with NIRISS imaging and grism. This is a relatively massive MS galaxy. Here JWST resolved the galaxy down to 300 pc scale revealing the spiral structure.
ALMA: compact dust core (2kpc) as in SMGs suggesting active bulge formation
MS galaxy, SFR = 85+-30 Msun/yr, Star = 10^10.6 Msun, Re = 5kpc
Group environment, spiral structure + SF core + inverted metallicity gradient might be due to minor merger
“The observed star formation at the bulge scale suggests an active bulge formation scenario, perhaps triggered by a minor merger.”
“compact dusty star formation in the core of A2744DSG-z3, a compact stellar component will remain in the center of the galaxy as the newly formed bulge.”
Breadcrumbs
Wu+2022 - The Identification of a Dusty Multiarm Spiral Galaxy at z=3.06 with JWST and ALMA
Study of a lensed sub-millimeter galaxy identified by ALMA at z~3 with NIRISS imaging and grism. This is a relatively massive MS galaxy. Here JWST resolved the galaxy down to 300 pc scale revealing the spiral structure.
“The observed star formation at the bulge scale suggests an active bulge formation scenario, perhaps triggered by a minor merger.”
“compact dusty star formation in the core of A2744DSG-z3, a compact stellar component will remain in the center of the galaxy as the newly formed bulge.”
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