RE-ASSEMBLING THE SAGITTARIUS DWARF GALAXY

@article{NiedersteOstholt2010REASSEMBLINGTS,
  title={RE-ASSEMBLING THE SAGITTARIUS DWARF GALAXY},
  author={Martin Niederste-Ostholt and Vasily A Belokurov and N. Wyn Evans and Jorge Pe{\~n}arrubia},
  journal={The Astrophysical Journal},
  year={2010},
  volume={712},
  pages={516-526}
}
What was the mass of the progenitor of the Sagittarius (Sgr) dwarf galaxy? Here, we reassemble the stellar debris using Sloan Digital Sky Survey and Two Micron All-Sky Survey data to find the total luminosity and likely mass. We find that the luminosity is in the range (9.6-13.2) ? 107 L ? or MV ~ ?15.1 to ?15.5, with 70% of the light residing in the debris streams. The progenitor is somewhat fainter than the present-day Small Magellanic Cloud, and comparable in brightness to the M31 dwarf… Expand
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