A MAD view of Trumpler 14
H. Sana, Y. Momany, M. Gieles, G. Carraro, Y. Beletsky, V. D. Ivanov,, G. De Silva, G. James

TL;DR
This study uses advanced adaptive optics to observe the Tr 14 cluster in the Carina region, revealing its structure, stellar population, and potential mass segregation, providing insights into its formation and evolution.
Contribution
It presents the widest AO mosaic of Tr 14, analyzes its stellar content, and investigates binary properties and mass segregation in a very young cluster.
Findings
Detected nearly 2000 sources with high image quality
Confirmed the young age of 3-5 x 10^5 years for the cluster
Identified 150 likely bound stellar pairs and evidence of mass segregation
Abstract
We present adaptive optics (AO) near-infrared observations of the core of the Tr 14 cluster in the Carina region obtained with the ESO multi-conjugate AO demonstrator, MAD. Our campaign yields AO-corrected observations with an image quality of about 0.2 arcsec across the 2 arcmin field of view, which is the widest AO mosaic ever obtained. We detected almost 2000 sources spanning a dynamic range of 10 mag. The pre-main sequence (PMS) locus in the colour-magnitude diagram is well reproduced by Palla & Stahler isochrones with an age of 3 to 5 1E+05 yr, confirming the very young age of the cluster. We derive a very high (deprojected) central density n0~4.5(+/-0.5) \times 10^4 pc^-3 and estimate the total mass of the cluster to be about ~4.3^{+3.3}_{-1.5} \times 10^3 Msun, although contamination of the field of view might have a significant impact on the derived mass. We show that the…
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