mass sagittarius dwarf galaxy
Since the discovery of this object by Ibata, Gilmore & Irwin (1994), several studies have explored its extent on the sky, its mean radial velocity, its proper motion perpendicular to the Galactic plane, and its internal velocity dispersion (Ibata et al. Then the density within each spherical shell is expanded in spherical harmonics, with harmonics up to l± 8 included. In addition to the seven globular clusters it brought with it, the galaxy’s remains are also visible as strung-out loops of stars circling our galaxy on nearly polar orbits. The orbits differ in the distribution of mass within the Sgr dwarf: at the start of orbit (b) the Sgr dwarf is more extended than at the start of orbit (a). The actual initial mass, MD(0) given in the next column, is usually somewhat smaller because equations (4) imply that rt
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