In the low-metallicity dwarf II Zw 40, JWST resolves 3.3 um PAH emission, finds it concentrated at the northern star cluster, and shows the 3.3/11.3 PAH ratio correlates with radiation hardness.
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Resolving Emission from Small Dust Grains in the Blue Compact Dwarf II Zw 40 with JWST
In the low-metallicity dwarf II Zw 40, JWST resolves 3.3 um PAH emission, finds it concentrated at the northern star cluster, and shows the 3.3/11.3 PAH ratio correlates with radiation hardness.