Chemical Abundances of new member stars in the Tucana II dwarf galaxy

Understand

We present chemical abundance measurements for seven stars with metallicities ranging from [Fe/H] = $-$3.3 to [Fe/H] = $-$2.4 in the Tucana II ultra-faint dwarf galaxy (UFD), based on high-resolution spectra obtained with the MIKE spectrograph on the 6.5 m Magellan-Clay Telescope.

• For three stars, we present detailed chemical abundances for the first time.
• Of those, two stars are newly discovered members of Tucana II and were selected as probable members from deep narrow band photometry of the Tucana II UFD taken with the SkyMapper telescope.
• This result demonstrates the potential for photometrically identifying members of dwarf galaxy systems based on chemical composition.