Extinction toward the Compact HII Regions G-0.02-0.07

TL;DR

This paper maps the extinction toward four compact HII regions in the Sgr A East complex, revealing their morphology and location using Paschen-alpha and radio data, to understand recent star formation in the galactic center.

Contribution

It provides the first detailed extinction map of the HII regions in Sgr A East using combined infrared and radio observations.

Findings

Extinction varies across the HII regions.

The morphology and location of the regions are characterized.

Insights into recent star formation in the galactic center.

Abstract

The four HII regions in the Sgr A East complex: A, B, C, and D, represent evidence of recent massive star formation in the central ten parsecs. Using Paschen-alpha images taken with HST and 8.4 GHz VLA data, we construct an extinction map of A-D, and briefly discuss their morphology and location.