HII regions feeding the interstellar medium in M83

TL;DR

This study investigates the internal dynamics of HII regions in galaxy M83, analyzing their interaction with the interstellar medium through detailed spectral data and the Luminosity-velocity dispersion relation.

Contribution

It introduces a refined method for analyzing HII region spectra, emphasizing the importance of instrumental response convolution and providing insights into their dynamics and ISM interaction.

Findings

Instrumental response convolution improves spectral analysis accuracy.

Most HII regions do not require secondary Gaussian components.

The study advances understanding of HII regions' role in ISM feeding.

Abstract

We analyse the internal dynamics of star-forming HII regions and their efficiency in interacting with the ISM. We use GHaFaS (Fabry-Perot) data of the nearby spiral galaxy M83 to perform multiple-Gaussian fitting to the integrated Halpha emission line for 136 HII regions, advanced instrumental response subtraction and to study the Luminosity-velocity dispersion relation. We find that the best way of dealing with instrumental response effects is convolving its actual shape with the Gaussian before fitting and that in our data almost none of the regions need a secondary Gaussian.