The (dark) halo-to-stellar mass ratio in the Spitzer Survey of Stellar
  Structure in Galaxies (S$^4$G)
  We use 3.6 $\mu$m photometry for 1154 disk galaxies ($i<65^{\circ}$) in the
Spitzer Survey of Stellar Structure in Galaxies (S$^{4}$G, Sheth et al. 2010)
to obtain the stellar component of the circular velocity. By combining the
disk+bulge rotation curves with HI line width measurements from the literature,
we estimate the ratio of the halo-to-stellar mass ($M_{\rm halo}/M_{\ast}$)
within the optical disk, and compare it to the total stellar mass ($M_{\ast}$).
We find the $M_{\rm halo}/M_{\ast}$-$M_{\ast}$ relation in good agreement with
the best-fit model at z$\approx$0 in $\Lambda$CDM cosmological simulations
(e.g. Moster et al. 2010), assuming that the dark matter halo within the
optical radius comprises a constant fraction ($\sim4\%$) of its total mass.
