Speaker
Description
In the interstellar medium, multiple processes in star formation and
evolution deposit, clear, and reorganize dust molecules around stellar
populations. In the Physics at High Angular Resolution in Nearby
Galaxies (PHANGS) surveys, stellar associations trace loosely bound
young stars in recent star formation sites. Leveraging the synergy
between HST and JWST, we measure dust extinction of stellar associations
in NGC 4826 (M 64) using the Hα to Paschen-α decrement. Combining this
robust extinction metric with SED modeling, we refine age measurements
of stellar populations. We further correlate stellar properties with
dust emissions from polycyclic aromatic hydrocarbons (PAH) as seen by
JWST. We tentatively note a drop in dust extinction around 7 Myr in 16
pc stellar associations, which roughly coincides with the clearing of
PAH emission. Our study explores the enrichment and dispersion of PAH,
connects stellar and dust properties, and reveals their mutual influence
on each other.
| Talk category | NOVA Network 1 |
|---|---|
| Second preference | NOVA Network 2 |
