Estudio en galaxias BCD: Mrk 600 y IIZw 33

CAMPUZANO CASTRO, F.; BOSCH, GUILLERMO; MUTHUKRISHNA, D.; FIRPO, V.; HÄGELE, G.F.; CARDACI, M.V.

Malargüe

Congreso; Reunión Anual de la Asociación Argentina de Astronomía; 2017

ICATE/CONICET - Universidad Nacional de San Juan

In the present work we perform a spectroscopic study of the kinematics of five star-forming regions in two blue compact dwarf galaxies: IIZw33 and Mrk600 using high-resolution spectra obtained using the MIKE spectrograph attached to the Clay telescope (Las Campanas Observatory, Chile). These regions show spectra with emission lines with clear evidence of complex kinematics. In order to perform the Gaussian decomposition of these profiles, we develop a robust code that statistically fit the parameters of the proposed Gaussians components used to represent the kinematic of the ionising gas belonging to these intense star-forming bursts. This code is based on the LMFit, a Python tool. In addition, through statistical indicators, as the Akaike one, we determinate the validity of each cinematic model fitted to our data. Once the kinematics has been determined, we continue the study performing the determination of the physical properties of the gas (electronic densities and temperatures), the ionic and total chemical abundances, and the ionisation degree for each kinematical component. To do this we apply the direct method, which requires accurate measurements of the weak auroral lines sensitive to the temperature, for which we have measured their different kinematical components thanks to the high quality of our spectra.