Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-04-02
Astronomy and Astrophysics
Astrophysics
50 pages; Full paper with all figures available at http://www.gb.nrao.edu/~koneil; Accepted by AJ
Scientific paper
10.1086/518831
We present B, R, and Halpha 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 1.8m 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 - 1.9, and most show at least a slight bluing of the colors with increasing radius. The Halpha images of these galaxies show an average star formation rate lower than is found for similar samples with higher surface brightness disks. Additionally, the galaxies studied have both higher gas mass-to-luminosity and diffuse Halpha emission than is found in higher surface brightness samples.
Bothun Greg
O'Neil Karen
Oey Sally
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