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- W4286588462 abstract "The star cluster (SC) age distribution of the Large Magellanic Cloud (LMC) exhibits a gap from $sim$ 4 to 10 Gyr ago, with an almost total absence of SCs. Within this age gap, only two confirmed SCs have been identified hitherto. Nonetheless, the star field counterpart does not show the same characteristics, making the LMC a peculiar galaxy where star formation history and cluster formation history appear to differ significantly. We re-analyzed the color-magnitude diagram (CMD) of the KMHK 1762 SC by using the deep optical photometry provided by the Yes, Magellanic Clouds Again survey, to robustly assess its age. First, we partially removed foreground and/or field stars by means of parallaxes and proper motions obtained from the {it Gaia} Early Data Release 3. Then, we applied the Automated Stellar Cluster Analysis package to the cleaned photometric catalogue to identify the isochrone that best matches the CMD of KMHK 1762. The estimated age of KMHK 1762 is $log (t) = 9.74 pm 0.15$ dex ($sim$5.5 Gyr), that is more than 2 Gyr older than the previous estimation which was obtained with shallower photometry. This value makes KMHK 1762 the third confirmed age gap SC of the LMC. The physical existence of a quiescent period of the LMC SC formation is questioned. We suggest it can be the result of an observational bias, originated by the combination of shallow photometry and limited investigation of the LMC periphery." @default.
- W4286588462 created "2022-07-22" @default.
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- W4286588462 date "2022-07-19" @default.
- W4286588462 modified "2023-09-26" @default.
- W4286588462 title "KMHK 1762: Another star cluster in the Large Magellanic Cloud age gap" @default.
- W4286588462 doi "https://doi.org/10.48550/arxiv.2207.09478" @default.
- W4286588462 hasPublicationYear "2022" @default.
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