INVESTIGADORES
PIATTI Andres Eduardo
artículos
Título:
The extended Main-Sequence Turnoff of the Milky Way open cluster Collinder 347
Autor/es:
A.E. PIATTI, CH. BONATTO
Revista:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2019 vol. 490 p. 2414 - 2420
ISSN:
0035-8711
Resumen:
We made use of the Gaia DR2 archive to comprehensively study the Milky Way open clusterCollinder 347, known until now as a very young object of solar metal-content.However, the G versus G_BP-G_RP colour-magnitude diagram (CMD) of bonafide probable cluster members, selected on the basis of individual stellar proper motions, their spatial distribution and placement in the CMD, reveals the existence of a Hyades-like age open cluster(log(t /yr) = 8.8) of moderately metal-poor chemical content ([Fe/H] = -0.4 dex), witha present-day mass of 3.3x10^3 Mo. The cluster exhibits an extended Main-Sequenceturnoff (eMSTO) of nearly 500 Myr, while that computed assuming Gaussian distributionsfrom photometric errors, stellar binarity, rotation and metallicity spread yields an eMSTO of~340 Myr. Such an age difference pointsto the existence within the cluster of stellar populations with different ages.
