INVESTIGADORES
LARES HARBIN LATORRE marcelo
congresos y reuniones científicas
Título:
A formal approach to compute density profiles and CMD fitting in stellar associations
Autor/es:
LARES, MARCELO
Lugar:
Córdoba
Reunión:
Congreso; III Terceras Jornadas de Astrofísica Estelar; 2016
Institución organizadora:
Observatorio Astronómico de Córdoba
Resumen:
A star cluster can be characterized by a set of fundamental parameters (distance, reddening, age, and metallicity), whose estimation is valuable for a variety of studies related to their formation and evolution. The main diagnostic tool to obtain them is the Color-Magnitude Diagram (CMD), but a carefull field cleaning must be performed previously to isolate the contribution of stars in the clusters from stars in the background. Several procedures have been proposed to reduce this contamination, which implement binning schemes to estimate membership probabilities. However, the choice of the bin sizes is arbitrary, the uncertainties in magnitudes and colors are usually not taken into account, and the memberships are assigned informally on a star-by-star basis. Then, the fitting of isochrones to the scatter plot of selected stars is made by eye. This approach is therefore subjective and does not complain with the principle of reproducible science. Here we propose a formal approach to estimate the projected density profile, to compute the statistical distribution in the CMD, and to find the best fit isochrones to the CMD.