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1 results

  • The Sagittarius dwarf mass-to-light ratio

  • S. Zaggia, P. Bonifacio, M. Bellazzini, E. Caffau, F. Ferraro, G. Marconi, L. Monaco, S. Monai, L. Sbordone
  • Journal:
    Proceedings of the International Astronomical Union / Volume 1 / Issue C198 / March 2005
    Published online by Cambridge University Press:
    08 November 2005, pp. 101-104
    Print publication:
    March 2005
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  • We report on the use of high-resolution spectra to obtain a detailed description of the Sagittarius dwarf spheroidal internal dynamics, its Mass and Mass to Light ratio (M/L). Our direct measure of the central velocity dispersion of SGR give $\sigma_{SGR}=8.1\pm0.4$ km/s which translates in a total mass estimate of $M_{SGR} =1.6\times10^8 M_{\odot}$ and corresponding $(M/L)_{SGR}=9.1 (M/L)_{\odot}$. We also report on a possible detection of rotation in the core of SGR.