Abstract
The galaxy UGC10205 is analyzed using Integral Field Spectroscopy (IFS) data from the Calar Alto Legacy Integral Field Area Survey (CALIFA). The understanding of the current state of this object represents a challenge because it is an extremely isolated galaxy, located in a void, which shows evidence of a possible recent merger. Our aim is to confirm whether there was such a merger and try to infer their precursors by means of a complete analysis of the properties of stellar populations, corresponding to metallicity, age, extinction and mass in stars. We first applied an uncertainty study taking on account two error sources, one directly from the data and the second from the fitting codes (Fit3D and Starlight), and models derived from population synthesis used for determining the physical properties of the galaxy. We found from our study of uncertainties that the optimal value of S/N to determine the properties of the stellar populations is 30, then we proceeded to apply a Voronoi binning on the datacube with this S/N value as lower limit. We then obtain Star Formation Histories in different regions of this galaxy and also the radial variations of the physical properties, which suggest this galaxy was formed inside-out. We also looked for local outliers from the mean values of the physical properties as tracers of a possible merger. We contrast the star formation histories with the hypothesis from the N-Body simulation of an encounter between UGC10205 and a small elliptical galaxy, performed by Reshetnikov and Evstigneeva (1999, Astron. Rep., 43, 367), where they determined by the dispersion of the particles and the current distribution of the tidal structure that the interaction took place ∼ 200 Myrs ago. We also present a preliminary study on the state of ionization of the gas that agrees this is a star-forming galaxy.
