Marc Verheijen

TL;DR: In this paper, a survey of the mass surface-density of spiral disks is presented, motivated by outstanding uncertainties in rotation-curve decompositions, and the authors use integral field spectroscopy to measure stellar and gas kinematics in nearly face-on galaxies.

TL;DR: In this paper, the authors present a performance analysis of the DiskMass Survey using collisionless tracers in the form of disk stars to measure the surface density of spiral disks, to provide an absolute calibration of the stellar mass-to-light ratio, and to yield robust estimates of the dark-matter halo density profile in the inner regions of galaxies.

TL;DR: For a rotating galaxy, the inner circular-velocity gradient d{R}V(0) provides a direct estimate of the central dynamical mass density, including gas, stars, and dark matter.

TL;DR: In this article, the authors present VLA H I observations of the low surface brightness galaxy UGC 12695 and its two companions, including a newly discovered dwarf galaxy 2333+1234, and compare the H I column density of this galaxy with the empirical value of Sigma_c = 10E21 atoms/cm^2 found in, i.e., Skillman's 1986 paper shows the star formation to be a local affair, occurring only in those regions where the column density is above this star formation threshold.