INVESTIGADORES
PIATTI Andres Eduardo
congresos y reuniones científicas
Título:
Parámetros astrofísicos fundamentales de 6 cúmulos de la Nube Mayor de Magallanes en el rango de transición entre 200 y 700 millones de años
Autor/es:
PIATTI, ANDRÉS E.; BICA, EDUARDO; GEISLER, DOUG; CLARIA OLMEDO, JUAN JOSÉ
Lugar:
La Plata
Reunión:
Congreso; Reunión Anual de la Asoc. Argentina de Astronomía; 2003
Resumen:
Complementing our recent Washington photometric studies on intermediate
age and young Large Magellanic Cloud (LMC) clusters, we present in this
work new results for 6 previously unstudied star clusters in the
transition range 200-700 Myr. We study NGC 1836, NGC 1860 and NGC 1865,
which are projected on the LMC bar; SL 444, also located in the central
disc but outside the bar, and LW 224 and SL 548, both located in the
outer disc. We derive ages and metallicities from extracted
T1 versus C-T1 colour-magnitude diagrams (CMDs),
using theoretical isochrones recently computed for the Washington
system. For the metallicity determinations, these CMDs are particularly
sensitive. We also estimate ages and metallicities of the surrounding
fields of NGC 1860 and NGC 1865 by employing the δT1
index and theoretical isochrones.