STAR POPULATIONS IN THE GALAXY NGC 2403

RODRIGUEZ, M.J:; BAUME, G.; FEINSTEIN, C.

Córdoba

Congreso; 7th Friends of Friends Meeting; 2017

Observatorio de Córdoba

Using images and multiband photometric data, obtained with the Advanced Camera for Surveys of the Hubble Space Telescope (HST/ACS), we performed a systematic and homogeneous identification of different star populations located in the central region of the spiral galaxy NGC 2403.Based on the location over global color magnitude diagrams, we split the objects among a probable young blue population and an old red population. In particular, we focused our attention on a selection of bright blue stars, employing over them two different searching methods: a) stellar density maps for the identification of the most relevant and large scale galactic structures, and b) the PLC method, that takes into account the spatial distance between objects, for those low scale star groups.As a result, we have estimated sizes and densities of the identified groups and we have built their individual colour-magnitude diagrams and luminosity functions. These tools have allowed us to derive the fundamental characteristics of the groups. Moreover, we were able to establish different structures at several levels of stellar density that revealed the hierarchical structure of the young population in NGC 2403.