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Stellar Velocity Dispersion of the Leo A Dwarf Galaxy

  • Authors: Warren R. Brown, Margaret J. Geller, Scott J. Kenyon, and Michael J. Kurtz

Brown et al. 2007 The Astrophysical Journal 666 231.

  • Provider: AAS Journals

Caption: Fig. 5.

Mass‐to‐light ratio of Local Group dSph galaxies with masses determined from central velocity dispersions (solid squares), adapted from Mateo (1998) and Koch et al. (2007). The dashed line is the (M/L)tot relation for a galaxy in a dark matter halo of constant mass ﹩3\times 10^{7}﹩ M. We estimate ﹩M/ L=20\pm 6﹩ for Leo A (star), which falls near the fixed halo mass relation. The arrow indicates what would happen if Leo A stopped forming stars and faded to a dSph‐like color. The Phoenix transition dwarf (open square) also agrees with the fixed halo mass relation.

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