IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Young star groups in the starburst galaxy NGC 253
Autor/es:
CARLOS FEINSTEIN; GUSTAVO BAUME; JIMENA RODRIGUEZ
Lugar:
Morelia
Reunión:
Congreso; Multi scale star formation; 2017
Institución organizadora:
Instituto de Radioastronomía y Astrofísica Universidad Nacional Autónoma de México
Resumen:
We carried out a search and identification of young stellar groupson a large area of ​​the spiral galaxy NGC 253. The study was based on images of five fields observed with the ACS/WFC camera of the Hubble Space Telescope. For the identification of these groups, we have used different search methods over a selection of bright blue stars. These methods consist in perform a large scale search by means of building stellar density maps, and then, a more detailed search using the PLC method that takes into account the spatial distance between objects. As a result, we have estimated sizes and densities of the identified groups and we have built their corresponding radial density profiles, colour-magnitude diagrams and luminosity functions.These tools have allowed us to derive the fundamental characteristics of the groups. Moreover, we found an important variation of the reddening throughout the galaxy, and we were able to establish different structures at several levels of stellar density that reveal the hierarchical structure of the young population in NGC 253.