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Bars and Lenses in Spiral Galaxies: Clues for Secular Evolution

  • Leslie K. Hunt
  • Carlo Giovanardi
  • Matthew A. Malkan
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 319)

Abstract

We analyze ~200 spiral galaxies in terms of elliptical isophotes, bar profile type, and non-axisymmetric perturbation amplitudes. More than half our sample is imaged in the H band, which enables us to derive gravitational potential and relative torque Q g . We find that bar axial ratios increase significantly with decreasing Hubble type, both for exponential and flat bars; however, at a given Hubble type, exponential bars tend to have a larger axial ratio than flat ones. We have also identified four different torque morphologies, and find that one of these is prevalent in strong bars. These results are interpreted in the context of a secular evolution scenario, in which we speculate that early-type flat bars are the descendants of late-type exponential ones.

Keywords

Bars spiral galaxies near-infrared 

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References

  1. Abraham, R.G., and Merrifield, M.R. 2000, ApJ, 120, 2835ADSGoogle Scholar
  2. Athanassoula, E., Morin, S., Wozniak, H., Puy, D., Pierce, M.J., Lombard, J., and Bosma, A. 1990, MNRAS, 245, 130ADSGoogle Scholar
  3. Athanassoula, E. 1992, MNRAS, 259, 328ADSGoogle Scholar
  4. Athanassoula, E. 2003, MNRAS, 341, 1179ADSCrossRefGoogle Scholar
  5. Block, D.L., Bournaud, F., Combes, F., Puerari, I., and Buta, R. 2002, AandA, 394, L35Google Scholar
  6. Block, D.L., Puerari, I., Knapen,J.H., Elmegreen, B.G., Buta, R., Stedman, S., and Elmegreen, D.M. 2001, AandA, 375, 761Google Scholar
  7. Buta, R. 1995, ApJS, 96, 39ADSCrossRefGoogle Scholar
  8. Buta, R., and Block, D.L. 2001, ApJ, 550, 243ADSCrossRefGoogle Scholar
  9. Buta, R., Block, D.L., and Knapen, J.H. 2003, ApJ, 126, 1148ADSGoogle Scholar
  10. Buta, R., and Combes, F. 1996, Fundamentals of Cosmic Physics, 17, 95ADSGoogle Scholar
  11. Buta, R., Laurikainen, E., and Salo, H. 2004, AJ, 127, 279ADSCrossRefGoogle Scholar
  12. Combes, F., and Elmegreen, B.G. 1993, AandA, 271, 391Google Scholar
  13. de Vaucouleurs, G., de Vaucouleurs, A., Corwin, H. G., Buta, R., Paturel, G., and Fouque, P. 1991, Third Reference Catalogue of Bright Galaxies (Springer, New York) (RC3)Google Scholar
  14. Elmegreen, D.M., Elmegreen, B.G., Chromey, F.R., Hasselbacher, D.A., and Bissell, B.A. 1996, AJ, 111, 1880ADSCrossRefGoogle Scholar
  15. Elmegreen, B.G., Elmegreen, D.M., Chromey, F.R., Hasselbacher, D.A., and Bissell, B.A. 1996, AJ, 111, 2233ADSCrossRefGoogle Scholar
  16. Elmegreen, B.G. and Elmegreen, D.M. 1985, ApJ, 288, 438ADSCrossRefGoogle Scholar
  17. Hunt, L.K., Pierini, D., and Giovanardi, C. 2004, AandA, 414, 905Google Scholar
  18. Kormendy, J. 1979, ApJ, 227, 714ADSCrossRefGoogle Scholar
  19. Lasker, B.M., Sturch, C.R., McLean, B.J., Russell, J.L., Jenkner, H., and Shara, M.M. 1990, AJ, 99, 2019ADSCrossRefGoogle Scholar
  20. Laurikainen, E., and Salo, H. 2002, MNRAS, 337, 1118ADSCrossRefGoogle Scholar
  21. Martin, P. 1995, AJ, 109, 2428ADSCrossRefGoogle Scholar
  22. Moriondo, G., et al. 1999, AandAS, 137, 101Google Scholar
  23. Regan, M.W., and Teuben, P.J. 2004, ApJ, 600, 595ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Leslie K. Hunt
    • 1
  • Carlo Giovanardi
    • 2
  • Matthew A. Malkan
    • 3
  1. 1.Istituto di Radioastronomia/Sezione FirenzeItaly
  2. 2.INAF-Osservatorio Astrofisico di ArcetriFirenzeItaly
  3. 3.University of CaliforniaLos AngelesUSA

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