Spectral Energy Distributions of a set of HII regions in M33 (HerM33es)

TL;DR

This study analyzes the spectral energy distributions of various HII regions in M33, revealing how their morphology influences dust properties and emission patterns across multiple wavelengths.

Contribution

It provides a detailed classification of HII regions by morphology and links their SEDs and emission distributions to their structural types, using multi-wavelength data.

Findings

Different SED trends are associated with morphological types.

Emission distribution varies with object morphology.

Dust and stellar cluster properties influence SEDs.

Abstract

Within the framework of the HerM33es Key Project for Herschel and in combination with multi-wavelength data, we study the Spectral Energy Distribution (SED) of a set of HII regions in the Local Group Galaxy M33. Using the Halpha emission, we perform a classification of a selected HII region sample in terms of morphology, separating the objects in filled, mixed, shell and clear shell objects. We obtain the SED for each HII region as well as a representative SED for each class of objects. We also study the emission distribution of each band within the regions. We find different trends in the SEDs for each morphological type that are related to properties of the dust and their associated stellar cluster. The emission distribution of each band within the region is different for each morphological type of object.