2007/04/02 by K. O’Neil, K. O'Neil, M. S. Oey +3 · 3 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.1086/518831
50 pages; Full paper with all figures available at http://www.gb.nrao.edu/~koneil; Accepted by AJ
arxiv created 2007/04/02 · openalex publication_date 2007/06/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
We present B , R , and Hα imaging data of 19 large disk galaxies whose properties are intermediate between classical low surface brightness galaxies and ordinary high surface brightness galaxies. We use data taken from the Lowell 1.8 m Perkins telescope to determine the galaxies' overall morphology, color, and star formation properties. Morphologically, the galaxies range from Sb through Irr and include galaxies with and without nuclear bars. The colors of the galaxies vary from B - R = 0.3 to 1.9, and most show at least a slight bluing of the colors with increasing radius. The Hα images of these galaxies show an average star formation rate lower than is found for similar samples with higher surface brightness disks. In addition, the galaxies studied have both higher gas mass-to-luminosity ratios and more diffuse Hα emission than is found in higher surface brightness samples.