Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-09-09
Mon.Not.Roy.Astron.Soc.394:340-356,2009
Astronomy and Astrophysics
Astrophysics
17 pages, 22 figures, submitted to MNRAS
Scientific paper
10.1111/j.1365-2966.2008.14292.x
We have used the Parkes Multibeam system and the Sloan Digital Sky Survey (SDSS) to assemble a sample of 195 galaxies selected originally from their HI signature to avoid biases against unevolved or low surface brightness objects. For each source 9 intrinsic properties are measured homogeneously, as well as inclination and an optical spectrum. The sample, which should be almost entirely free of either misidentification or confusion, includes a wide diversity of galaxies ranging from inchoate, low surface brightness dwarfs to giant spirals. Despite this diversity there are 5 clear correlations among their properties. They include a common dynamical mass-to-light ratio within their optical radii, a correlation between surface-brightness and Luminosity and a common HI surface-density. Such correlation should provide strong constrains on models of galaxy formation and evolution.
Cortese Luca
Dalcanton Julianne J.
Disney Michael J.
Garcia-Appadoo Diego A.
West Andrew A.
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