The Metallicity Dependence of PAH Emission in Galaxies II: 2 Insights from JWST/NIRCam Imaging of the Smallest Dust Grains in M101

JPL Data 2026 Dataset Open access

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Authors: Brandon S. Hensley
DOI: 10.48577/jpl.gqtmk8
Cited by: 0

Abstract

We explore the physical origins of the observed deficit of polycyclic aromatic hydrocarbons (PAHs) at sub-solar metallicity using JWST/NIRCam imaging of the nearby galaxy M101, covering regions from solar metallicity (Z⊙) down to 0.4Z⊙. These maps are used to trace the radial evolution of the shortest-wavelength PAH feature at 3.3 μm, which is emitted preferentially by the smallest PAHs (

Fields of Study & Subjects

Astrophysics and Star Formation Studies Galaxies: Formation Evolution Phenomena Stellar planetary and galactic studies

Publication details

Journal / source
JPL Data
Publication date
1 January 2026
Language
EN
Document type
Dataset