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The Star Formation Efficiency in Nearby Galaxies: Measuring Where Gas Forms Stars Effectively
Adam K. Leroy, Fabian Walter, Elias Brinks +4
We measure the star formation efficiency (SFE), the star formation rate per unit gas, in 23 nearby galaxies and compare it to expectations from proposed star formation laws and thr…
The Star Formation Law in Nearby Galaxies on Sub-Kpc Scales
Frank Bigiel, Adam Leroy, Fabian Walter +4
(Abridged) We present a comprehensive analysis of the relationship between star formation rate surface density (SFR SD) and gas surface density (gas SD) at sub-kpc resolution in a…
THINGS: The HI Nearby Galaxy Survey
F. Walter, E. Brinks, W. J. G. de Blok +4
We present "The HI Nearby Galaxy Survey (THINGS)", a high spectral (<=5.2 km/s) and spatial (~6") resolution survey of HI emission in 34 nearby galaxies obtained using the NRAO Ver…
LCDM Satellites and HI Companions - The Arecibo ALFA Survey of NGC 2903
J. A. Irwin, G. L. Hoffman, K. Spekkens +11
We have conducted a deep, complete HI survey, using Arecibo/ALFA, of a field centered on the nearby, isolated galaxy, NGC 2903, which is similar to the Milky Way in its properties.…
Dust and Atomic Gas in Dwarf Irregular Galaxies of the M81 Group: The SINGS and THINGS view
F. Walter, J. Cannon, H. Roussel +22
[abridged] We present observations of the dust and atomic gas phase in seven dwarf irregular galaxies of the M81 group from the SINGS and THINGS surveys. The Spitzer observations p…
The Rotation Velocity Attributable to Dark Matter at Intermediate Radii in Disk Galaxies
S. S. McGaugh, W. J. G. de Blok, J. M. Schombert +2
We examine the amplitude of the rotation velocity that can be attributed to the dark matter halos of disk galaxies, focusing on well measured intermediate radii. The data for 60 ga…
First Results from THINGS: The HI Nearby Galaxy Survey
W. J. G. de Blok, F. Walter, E. Brinks +2
We describe The HI Nearby Galaxy Survey (THINGS), the largest program ever undertaken at the VLA to perform 21-cm HI observations of the highest quality (~7'', <= 5 km/s resolution…
Mass Density Profiles of LSB Galaxies
W. J. G. de Blok, Stacy S. McGaugh, Albert Bosma +1
We derive the mass density profiles of dark matter halos that are implied by high spatial resolution rotation curves of low surface brightness galaxies. We find that at small radii…
Constraints on the Structure of Dark Matter Halos from the Rotation Curves of Low Surface Brightness Galaxies
Frank C. van den Bosch, Brant E. Robertson, Julianne J. Dalcanton +1
We re-examine the disk-halo decompositions of the rotation curves of low surface brightness (LSB) galaxies with V_max > 80 km/s, taking full account of the effects of beam smearing…
Testing Modified Newtonian Dynamics with Low Surface Brightness Galaxies --Rotation curve fits-
W. J. G. de Blok, S. S. McGaugh
We present MOND (Modified Newtonian Dynamics) fits to 15 rotation curves of LSB galaxies. Good fits are readily found, although for a few galaxies minor adjustments to the inclinat…
Does low surface brightness mean low surface density?
W. J. G. de Blok, S. S. McGaugh
We compare the dynamical properties of two galaxies at identical positions on the Tully-Fisher relation, but with different surface brightnesses. We find that the low surface brigh…