Sextans dSph is a composite system from a minor merger 13 Gyr ago, with metal-poor core and more evolved accreted envelope showing inverse metallicity gradient.
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Spatially resolved star formation history of Sextans dSph
Sextans dSph is a composite system from a minor merger 13 Gyr ago, with metal-poor core and more evolved accreted envelope showing inverse metallicity gradient.