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Paper: Star Formation in the Extreme Outer Galaxy: the Initial Mass Function in a Low Metallicity Environment
Volume: 396, Formation and Evolution of Galaxy Disks
Page: 225
Authors: Yasui, C.; Kobayashi, N.; Tokunaga, A.T.; Saito, M.; Tokoku, C.
Abstract: We are conducting a deep near-infrared (NIR) imaging survey of young embedded clusters in the extreme outer Galaxy (EOG), at the Galactic radius (RG) of more than 18 kpc. The EOG is an excellent laboratory to study the nature of the initial mass function (IMF) in a low-metallicity environment with a great advantage of the proximity compared to nearby dwarf galaxies, such as LMC and SMC. As a first step, we obtained deep NIR images of Digel Cloud 2 clusters at RG ≃ 19 kpc using the Subaru 8.2-m telescope. The observed K-band luminosity function shows that IMF in the low metallicity environment down to ∼ 0.1 M is not significantly different from the typical IMFs in the field and in the nearby star clusters as was suggested in our earlier work (Yasui et al. 2006).
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