@inproceedings{3b193ecb53344a2c96526935f3007051,

title = "The Stability of Galaxy Disks",

abstract = "We calculate the stellar surface mass density (Σ*) and two-component (gas+stars) disk stability (QRW) for 25 late-type galaxies from the DiskMass Survey. These calculations are based on fits of a dynamical model to our ionized-gas and stellar kinematic data performed using a Markov Chain Monte Carlo sampling of the Bayesian posterior. Marginalizing over all galaxies, we find a median value of QRW = 2.0±0.9 at 1.5 scale lengths. We also find that QRW is anti-correlated with the star-formation rate surface density (Σ*), which can be predicted using a closed set of empirical scaling relations. Finally, we find that the star-formation efficiency (Σ*/Σg) is correlated with Σ* and weakly anti-correlated with QRW. The former is consistent with an equilibrium prediction of Σ*/Σg ∝ Σ*1/2. Despite its order-of-magnitude range, we find no correlation of Σ*/ΣgΣ*1/2 with any other physical quantity derived by our study.",

author = "Westfall, {K. B.} and Andersen, {D. R.} and Bershady, {M. A.} and Martinsson, {T. P. K.} and Swaters, {R. A.} and Verheijen, {M. A. W.}",

year = "2014",

month = mar,

day = "1",

language = "English",

volume = "480",

series = "ASP Conference Series",

pages = "93--",

editor = "M.S. Seigar and P. Treuthardt",

booktitle = "Structure and Dynamics of Disk Galaxies",

note = "Structure and Dynamics of Disk Galaxies ; Conference date: 12-08-2013 Through 16-08-2013",

}