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Kinematics of RR Lyraes in the Inner (Old?) Halo
Published online by Cambridge University Press: 07 August 2017
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Zinn & Lee (1994, in prep.) have shown that the halo globular clusters with Rgc < 6 kpc are dominated by clusters with relatively blue horizontal branches for their metal abundance, which they interpret as a sign of their old relative ages. Of these “Old Halo” clusters having −1.7 < [Fe/H] < −0.8 dex, they find a net rotation about the galactic center of Vrot = 59 ± 22 km s−1, and a line-of-sight velocity dispersion of σlos = 62 ± 10 km s−1.
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- Copyright © Kluwer 1995
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