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Detailed chemical abundances of distant RR Lyrae stars in the Virgo Stellar Stream

We present the first detailed chemical abundances for distant RR Lyrae stars members of the Virgo Stellar Stream (VSS), derived from X-Shooter medium-resolution spectra. Sixteen elements from carbon to barium have been measured in six VSS RR Lyrae stars, sampling all main nucleosynthetic channels. For the first time we will be able to compare in detail the chemical evolution of the VSS progenitor with those of Local Group dwarf spheroidal galaxies (LG dSph) as well as the one of the smooth halo.

preprint2016arXivOpen access
S. DuffauL. SbordoneA. K. VivasC. J. HansenM. ZoccaliM. CatelanD. MinnitiE. K. Grebel
astro-ph.GA
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Open access8 authors1 topic
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S. DuffauL. SbordoneA. K. VivasC. J. HansenM. ZoccaliM. CatelanD. MinnitiE. K. Grebel

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