What is the True Fraction of Barred Spiral Galaxies?
We have determined the fraction of barred galaxies in the H-band for a statistically well-defined sample of 186 spirals. At H, 56% of our sample is strongly barred, 16% is weakly barred, and only 27% is unbarred. The RC3 and the Carnegie Atlas of Galaxies both classify roughly 30% of our sample as strongly barred. Thus strong bars are nearly twice as prevalent in the H-band as in the optical. Roughly 40% of the galaxies in our sample that are classified as unbarred in the RC3 show evidence for a bar in the H-band; for the Carnegie Atlas the fraction is roughly 60%. We find no significant trend in bar fraction as a function of morphology, in either the optical or H-band.
Unable to display preview. Download preview PDF.
- de Vaucouleurs, G., de Vaucouleurs A., Corwin, H.G., Jr., Buta, R.J., Paturel, G. and Fouqué, P.: 1991, Third Reference Catalogue of Bright Galaxies, Springer-Verlag, New York (RC3).Google Scholar
- Eskridge, P.B., et al.: 2000b, in preparation.Google Scholar
- Frogel, J.A., Quillen, A.C. and Pogge, R.W.: 1996, in: D. Block and J.M. Greenberg (eds.), New Extragalactic Perspectives in the New South Africa, Kluwer Academic Publishers, Dordrecht, p. 65.Google Scholar
- Sandage, A. and Bedke, J.: 1994, The Carnegie Atlas of Galaxies, Carnegie Institute of Washington, Washington DC (CAG).Google Scholar