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Disk Stability and Neutral Hydrogen as a Tracer of Dark Matter
Gerhardt R. Meurer, Zheng Zheng, W. J. G. de Blok
We derive the projected surface mass distribution Sigma_M for spherically symmetric mass distributions having an arbitrary rotation curve. For a galaxy with a flat rotation curve a…
Low CO Luminosities in Dwarf Galaxies
Andreas Schruba, Adam K. Leroy, Fabian Walter +10
[Abridged] We present maps of CO 2-1 emission covering the entire star-forming disks of 16 nearby dwarf galaxies observed by the IRAM HERACLES survey. The data have 13 arcsec angul…
Estimating the Star Formation Rate at 1 kpc Scales in Nearby Galaxies
Adam K. Leroy, Frank Bigiel, W. J. G. de Blok +9
Using combinations of Hα, ultraviolet (UV), and infrared (IR) emission, we estimate the star formation rate (SFR) surface density, Σ_SFR, at 1 kpc resolution for 30 disk galaxies t…
On the Origin of the Supergiant HI Shell and Putative Companion in NGC 6822
John M. Cannon, Erin M. O'Leary, Daniel R. Weisz +6
We present new Hubble Space Telescope Advanced Camera for Surveys imaging of six positions spanning 5.8 kpc of the HI major axis of the Local Group dIrr NGC 6822, including both th…