Table 1: Parameters for the four M 31 models considered by Kerins (2004). Columns are the model name, the component name, the mass of the component, its central density $\rho _0$ and the adopted cut-off radius R. Additional columns give, where appropriate, the core radius a, the disk scale length h and height H, the flattening parameter q and the B-band mass-to-light ratio $M/L_{\rm B}$ in solar units.
Model Component Mass $\rho _0$ R a h H q M/L$_{\rm B}$
    ( $\times 10^{10}~M_{\odot}$) ( $\times M_\odot$ pc-3) (kpc) (kpc) (kpc) (kpc)    

Massive halo
halo 191 0.25 155 2 - - 1 -
  bulge 4.4 4.5 40 1 - - 0.6 9
  disk 3.2 0.24 40 - 6 0.3 - 4.5
Massive bulge halo 89 0.01 85 10 - - 1 -
  bulge 8 2.5 40 1.5 - - 0.6 14
  disk 11 0.6 40 - 7 0.3 - 18
Massive disk halo 79 0.01 110 8 - - 1 -
  bulge 4.4 4.5 40 1 - - 0.6 9
  disk 19 1.4 40 - 6 0.3 - 26
Reference halo 123 0.065 100 4 - - 1 -
  bulge 4.4 4.5 40 1 - - 0.6 9
  disk 5.3 0.35 40 - 6.4 0.3 - 8


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