178 citations · 269 across the 7 of their papers we have counts for
8 papers
Uncertainties in Galaxy Rotation Curves
J A Sellwood, Kristine Spekkens, Carter S. Eckel
Assessing the likelihood that the rotation curve of a galaxy matches predictions from galaxy formation simulations requires that the uncertainties in the circular speed as a functi…
Non-parametric decompositions of disk galaxies in SG using DiskFit
Colin Lewis, Kristine Spekkens
We present photometric models of 532 disk galaxies in 3.6μm images from the Spitzer Survey of Stellar Structure in Galaxies (SG) using the non-parametric DiskFit algorithm. We…
Simulating a slow bar in the low surface brightness galaxy UGC 628
Matthew H. Chequers, Kristine Spekkens, Lawrence M. Widrow +1
We present a disc-halo N-body model of the low surface brightness galaxy UGC 628, one of the few systems that harbours a "slow" bar with a ratio of corotation radius to bar length…
The RINGS Survey: High-Resolution H-alpha Velocity Fields of Nearby Spiral Galaxies with the SALT Fabry-Perot
Carl J. Mitchell, J. A. Sellwood, T. B. Williams +3
We have obtained high-spatial-resolution spectrophotometric data on several nearby spiral galaxies with the Southern African Large Telescope (SALT) Fabry-Pérot interferometer on th…
DiskFit: a code to fit simple non-axisymmetric galaxy models either to photometric images or to kinematic maps
J. A. Sellwood, Kristine Spekkens
This posting announces public availability of version 1.2 of the DiskFit software package developed by the authors, which may be used to fit simple non-axisymmetric models either t…
Searching for Non-axisymmetries in NGC 6503: A Weak End-on Bar
Rachel Kuzio de Naray, Cameron A. Arsenault, Kristine Spekkens +4
The isolation, simple apparent structure, and low luminosity of the nearby spiral galaxy NGC 6503 make it an ideal candidate for an in-depth kinematic and photometric study. We int…
Modeling Non-Circular Motions in Disk Galaxies: A Bar in NGC 2976
K. Spekkens, J. A. Sellwood
We give a brief description of a new model for non-circular motions in disk galaxy velocity fields, that does not invoke epicycles. We assume non-circular motions to stem from a ba…
Modeling Non-Circular Motions in Disk Galaxies: Application to NGC 2976
Kristine Spekkens, J. A. Sellwood
We present a new procedure to fit non-axisymmetric flow patterns to 2-D velocity maps of spiral galaxies. We concentrate on flows caused by bar-like or oval distortions to the tota…