2015/11/03 by Carl J. Mitchell, J. A. Sellwood, Mitchell, Carl J. +9
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Fabry–Pérot interferometer #Galaxies: Formation, Evolution, Phenomena #Galaxy #Optics #Physics #Spectral line #Spectrograph #Spiral (railway) #Spiral galaxy #Stellar, planetary, and galactic studies #Telescope #astro-ph.GA
paper · pdf · doi:10.48550/arxiv.1511.01066
published in arXiv (Cornell University) (Cornell University) · 8 pages, 8 figures, Conference proceeding for SALT Science Conference 2015
arxiv created 2015/11/03 · openalex publication_date 2015/11/03 · arxiv updated 2015/11/04 · openalex created_date 2022/10/03 · openalex updated_date 2026/08/08
We have obtained high-spatial-resolution spectrophotometric data on several\nnearby spiral galaxies with the Southern African Large Telescope (SALT)\nFabry-P 'erot interferometer on the Robert Stobie Spectrograph (RSS) as a part\nof the RSS Imaging spectroscopy Nearby Galaxy Survey (RINGS). We have\nsuccessfully reduced two tracks of Fabry-P 'erot data for the galaxy NGC 2280\nto produce a velocity field of the H-alpha line of excited hydrogen. We have\nmodeled these data with the DiskFit modeling software and found these models to\nbe in excellent agreement both with previous measurements in the literature and\nwith our lower-resolution HI velocity field of the same galaxy. Despite this\ngood agreement, small regions exist where the difference between the H-alpha\nand HI velocities is larger than would be expected from typical dispersions. We\ninvestigate these regions of high velocity difference and offer possible\nexplanations for their existence.\n