[Sr/Fe] and [Ba/Fe] as a function of [Fe/H]. The Sextans stars measured in this study are shown by diamonds with error bars; open diamonds are our target stars observed by Subaru HDS while filled diamonds are re-analyzed stars taken from the VLT archive. Previously studied Sextans stars are depicted by circles (Shetrone et al. 2001; Aoki et al. 2009a). The abundances of Galactic halo stars are shown by asterisks taken from the SAGA database (Suda et al. 2008). Blue symbols show RGB stars that have similar metallicity (− 3.22 < [Fe/H] < −2.65) to the five stars. Right panel: histogram of these halo RGB stars. The histogram range shaded in blue shows the range where our five Sextans dwarf galaxy stars lie.