Subaru Hyper Suprime-Cam Survey for the Local Group Dwarf Galaxies: Ursa Minor
2018 ◽
Vol 14
(S344)
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pp. 94-95
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AbstractWe have carried out a wide and deep imaging survey for the Local Group dwarf spheroidal galaxy Ursa Minor (UMi) using Hyper Suprime-Cam (HSC). The data cover out beyond the nominal tidal radius down to ~25 mag in i band, which is ~2 mag below the main sequence turn-off point. The structural parameters of UMi are derived using red giant branch (RGB) stars and sub-giant branch (SGB) stars, and the tidal radius is suggested to be larger than those estimated by the previous studies. It is also found that the distribution of bluer RGB/SGB stars is more extended than that of redder RGB/SGB stars. The fraction of binary systems is estimated to be ~0.4 from the morphology of the main sequences.
2017 ◽
Vol 13
(S334)
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pp. 319-320
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2011 ◽
Vol 141
(6)
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pp. 194
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