It is assumed that the two-fold disc-wide symmetry of spirals is caused by density waves, but also the potential of a bar component may have a significant influence on structural properties. The strength of the bar component appears to be anti-correlated with the degree of symmetry of star-forming regions in the spiral arms (Rozas et al., 1998). We present new results of R and Ha surface photometry of a sample of bright barred spirals. A photometric decompositon of the galaxy components is carried out in order to make a more accurate measurement of the strength of the bar and its interrelation to gas and stars in the disc.
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Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, EnglandLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England
Moore, T. J. T.
Urquhart, J. S.
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CSIRO Astron & Space Sci, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
Max Planck Inst Radioastron, D-53121 Bonn, GermanyLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England
Urquhart, J. S.
Morgan, L. K.
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Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, EnglandLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England
Morgan, L. K.
Thompson, M. A.
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Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, EnglandLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England
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Inst Astrofis Canarias, E-38200 Tenerife, Spain
Univ La Laguna, Dept Astrofis, San Cristobal la Laguna, SpainInst Astrofis Canarias, E-38200 Tenerife, Spain
Font, Joan
Beckman, John E.
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Inst Astrofis Canarias, E-38200 Tenerife, Spain
Univ La Laguna, Dept Astrofis, San Cristobal la Laguna, Spain
CSIC, Madrid, SpainInst Astrofis Canarias, E-38200 Tenerife, Spain
Beckman, John E.
James, Phil A.
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Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, EnglandInst Astrofis Canarias, E-38200 Tenerife, Spain