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Anomalous Stellar Populations in LSB Galaxies
James Schombert, Stacy McGaugh
We present new HST WFC3 near-IR observations of the CMD's in two LSB galaxies, F575-3 and F615-1, notable for having no current star formation based on a lack of H emission. Key…
Mass-Velocity Dispersion Relation in HIFLUGCS Galaxy Clusters
Yong Tian, Po-Chieh Yu, Pengfei Li +2
We investigate the mass-velocity dispersion relation (MVDR) in 29 galaxy clusters in the HIghest X-ray FLUx Galaxy Cluster Sample (HIFLUGCS). We measure the spatially resolved, lin…
Testing the Strong Equivalence Principle: Detection of the External Field Effect in Rotationally Supported Galaxies
Kyu-Hyun Chae, Federico Lelli, Harry Desmond +3
The strong equivalence principle (SEP) distinguishes General Relativity from other viable theories of gravity. The SEP demands that the internal dynamics of a self-gravitating syst…
Can Bars Erode Cuspy Halos ?
Sandeep Kumar Kataria, Mousumi Das, Stacy McGaugh
One of the major and widely known small scale problem with the Lambda CDM model of cosmology is the core-cusp problem. In this study we investigate whether this problem can be reso…
Predictions and Outcomes for the Dynamics of Rotating Galaxies
Stacy McGaugh
A review is given of a priori predictions made for the dynamics of rotating galaxies. One theory - MOND - has had many predictions corroborated by subsequent observations. While it…
A comprehensive catalog of dark matter halo models for SPARC galaxies
Pengfei Li, Federico Lelli, Stacy McGaugh +1
We present rotation curve fits to 175 late-type galaxies from the Spitzer Photometry & Accurate Rotation Curves (SPARC) database using seven dark matter (DM) halo profiles: pseudo-…