Global stability and the mass-to-light ratio of galactic disks

Abstract

We examine the global stability of an exponential stellar disk embedded in a dark matter halo and constrain the mass-to-light ratio of observed disks in the I-band, ΥI . Assuming only that the radial surface density distribution of disks is exponential, we derive an analytic upper limit: ΥI ∼ 2.4h, for a Hubble constant of 100h km s Mpc. Using N -body… (More)

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@inproceedings{Syer1997GlobalSA, title={Global stability and the mass-to-light ratio of galactic disks}, author={D. Syer and Shude Mao}, year={1997} }