Internal kinematic and physical properties in a BCD galaxy: Haro 15 in detail

TL;DR

This study provides a detailed analysis of the ionized gas's kinematic and physical properties in Haro 15, revealing complex internal motions and chemical abundances through multi-instrument spectroscopy.

Contribution

It offers a comprehensive 2D spectroscopic analysis of Haro 15's star-forming knots, combining multiple observational techniques to resolve complex kinematics and physical conditions.

Findings

Complex kinematic structures identified in galaxy knots

Variation in chemical abundances across regions

High-resolution spectroscopy reveals detailed internal motions

Abstract

We present a detailed study of the kinematic and physical properties of the ionized gas in multiple knots of the blue compact dwarf galaxy Haro 15. Using echelle and long slit spectroscopy data, obtained with different instruments at Las Campanas Observatory, we study the internal kinematic and physical conditions (electron density and temperature), ionic and total chemical abundances of several atoms, reddening and ionization structure. Applying direct and empirical methods for abundance determination, we perform a comparative analysis between these regions and in their different components. On the other hand, our echelle spectra show complex kinematics in several conspicuous knots within the galaxy. To perform an in-depth 2D spectroscopic study we complete this work with high spatial and spectral resolution spectroscopy using the Integral Field Unit mode on the Gemini Multi-Object Spectrograph instrument at the Gemini South telescope. With these data we are able to resolve the complex kinematical structure within star forming knots in Haro 15 galaxy.