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- W2963805917 abstract "By exploiting the exceptional high-resolution capabilities of the near-IR camera GSAOI combined with the Gemini Multi-Conjugate Adaptive System at the GEMINI South Telescope, we investigated the structural and physical properties of the heavily obscured globular cluster Liller 1 in the Galactic bulge. We have obtained the deepest and most accurate color–magnitude diagram published so far for this cluster, reaching (below the main-sequence turnoff level). We used these data to redetermine the center of gravity of the system, finding that it is located about 22 southeast from the literature value. We also built new star density and surface brightness profiles for the cluster and rederived its main structural and physical parameters (scale radii, concentration parameter, central mass density, total mass). We find that Liller 1 is significantly less concentrated (concentration parameter ) and less extended (tidal radius and core radius ) than previously thought. By using these newly determined structural parameters, we estimated the mass of Liller 1 to be ( for a Kroupa initial mass function), which is comparable to that of the most massive clusters in the Galaxy (ω Centari and Terzan 5). Also, Liller 1 has the second-highest collision rate (after Terzan 5) among all star clusters in the Galaxy, thus confirming that it is an ideal environment for the formation of collisional objects (such as millisecond pulsars)." @default.
- W2963805917 created "2019-07-30" @default.
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- W2963805917 date "2015-06-15" @default.
- W2963805917 modified "2023-10-12" @default.
- W2963805917 title "GEMINI/GeMS OBSERVATIONS UNVEIL THE STRUCTURE OF THE HEAVILY OBSCURED GLOBULAR CLUSTER LILLER 1." @default.
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- W2963805917 doi "https://doi.org/10.1088/0004-637x/806/2/152" @default.
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